PUBLICATIONS IN REFEREED JOURNALS:

Anmar Khadra, Xinzhi Liu and Xuemin Shen, ``Application of impulsive synchronization to communication security'', IEEE Trans. Circuits Systems I, 50, (2003), 341-351.

Anmar Khadra, Xinzhi Liu and Xuemin Shen, ``Robust Impulsive synchronization and application to communication security'', Dynam. Contin. Discrete Impuls. Systems, Ser. B Appl. Algorithms, 10, (2003), 403-416.

Xinzhi Liu, Xuemin Shen and Yi Zhang, ``Exponential stability of singularly perturbed systems with time delay'', Appl. Anal., 82, (2003), 117-130.

Xinzhi Liu and George Ballinger, ``Boundedness for impulsive delay differential equations and applications to population growth models'', Nonlinear Anal., 53, (2003), 1041-1062.

Bin Liu, Xinzhi Liu and Xiaoxin Liao, ``Robust dissipativity for impulsive dynamical systems'', Mathematical Problems in Engineering, to appear.

Yili Li, Xinzhi Liu and Xuemin Shen, ``Chaos synchronization using impulsive driving and application to secure communication'', Dynam. Contin. Discrete Impuls. Systems, Ser. B Appl. Algorithms, to appear.

Bin Liu, Xinzhi Liu and Xiaoxin Liao, ``Robust H-stability for Hopfield neural networks with impulsive effects and design of impulsive controller for Hopfield neural networks'' Control Theo. Appl, to appear.

Xinzhi Liu and George Ballinger, ``Existence and continuability of solutions for differential equations with delays and state-dependent impulses'', Nonlinear Anal., 51, (2002) 633-647.

Bingji Xu, Xiaoxin Liao, Lun Zhou and Xinzhi Liu, ``Estimation of domain of attraction and and convergence rate for high order Hopfield neural networks'', J. Electro. Infor., 24, (2002), 671-677.

Bingji Xu, Yi Shen, Xiaoxin Liao and Xinzhi Liu, ``Stability analysis of 2nd-order Hopfield neural networks with delay'', System Eng. Electro. Tech., 24, (2002), 77-81.

Bingji Xu, Xiaoxin Liao and Xinzhi Liu, ``Absolute stability of control systems with multiple delays'', J. Huazhong Univ. Sci. Tech., 30, (2002), 51-53.

Xinzhi Liu and Kok Lay Teo, ``Impulsive control of chaotic system'', International J. Bifurcation Chaos, 12, (2002) 1181-1190.

Xinzhi Liu, S. Sivaloganathan and Shenghai Zhang, ``Analysis of cell population PDEs models with general maturation rates'', ANZIAM J., 43, (2002) 359-374.

Xilin Fu, Xinzhi Liu and S.Sivaloganathan, ``Oscillation criteria for impulsive parabolic systems'', Appl. Anal., 79, (2001), 239-255.

Xinzhi Liu and Michael D. Shaw, ``Boundedness in terms of two measures for perturbed systems by generalized variation of parameters'', Communications Appl. Analysis, 5, (2001) 435-443.

Xinzhi Liu, Xuemin Shen and Yi Zhang, ``Absolute stability of nonlinear systems with time delays and applications to neural networks'', Mathematical Problems in Engineering, 7, (2001) 413-431.

Xinzhi Liu and Robert Dickson, ``Stability analysis of Hopfield neural networks with uncertainty'', Math. Computer Modelling, 34, (2001) 353-363.

Xinzhi Liu and F.A. McRay,``Monotone iterative method for boundary value problems of parametric differential equations'', JAMSA, 14, (2001) 183-187.

Xinzhi Liu, Xuemin Shen and Yi Zhang, ``Stability Analysis of a Class of Hybrid Dynamic Systems'', DCDIS Series B, 8, (2001) 359-373.

Xinzhi Liu and Xuemin Shen, ``Impulsive Stabilization and Application to a Population Growth Model'', Nonlinear Dynamics Sytems Theory, to appear.

George Ballinger and Xinzhi Liu, ``Uniform asymptotic stability of impulsive delay differential equations'', Computers Math. Appl., 41, (2001) 903-915.

Xinzhi Liu, S. Sivaloganathan and Shenghai Zhang, ``On stability and hypercyclicity for cell population models'', Nonlinear Anal. Real World Appl., 1, (2000) 247-260.

Xinzhi Liu and Jianhua Shen, ``Razumikhin-type theorems on boundedness for impulsive functional differential equations'', Dynamic Systems & Appl., 9, (2000) 389-404.

Zhiguo Luo, Jianhua Shen and Xinzhi Liu,``Oscillation criteria for a class of forced neutral equations'', Dynam. Contin. Discrete Impuls. Systems, 7, (2000) 489-501.

Saroop K. Kaul and Xinzhi Liu, ``Generalized variation of parameters and stability of impulsive systems, Nonlinear Anal., 40, (2000) 295-307.

George Ballinger and Xinzhi Liu, ``Existence, uniqueness and boundedness results for impulsive delay differential equations'', Appl. Anal., 74, (2000) 71-93.

Jianhua Shen, Zhiguo Luo and Xinzhi Liu, `` Impulsive stabilization of functional differential equations via Lyapunov functionals,'' J. Math. Anal. Appl, 240, (1999) 1-15.

Xinzhi Liu, S. Sivaloganathan and Shenghai Zhang, `` Monotone iterative techniques for time dependent problem with applications'', J. Math. Anal. Appl, 237, (1999) 1-18.

Xinzhi Liu and Dajun Guo, ``Method of upper and lower solutions for second order impulsive integro-differential equations in a Banach space'', Computers and Mathematics with Applications, 38, (1999) 213-223.

Xinzhi Liu and Sivasundaram, ``Stability of moving invariant sets and controlled uncertain impulsive systems'', Nonlinear Studies, 6, (1999), 45-53.

Xinzhi Liu and Jianhua Shen, ``Asymptotic behavior of solutions of impulsive neutral differential equations'', Applied Math. Letters, 12, (1999), 51-58.

Saroop K. Kaul and Xinzhi Liu, ``Vector Lyapunov functions for impulsive differential systems with variable times'', DCDIS, 6, (1999), 25-38.

George Ballinger and Xinzhi Liu, ``Existence and uniqueness results for impulsive delay differential equations'', DCDIS, 5, (1999), 579-591.

Xilin Fu and Xinzhi Liu, ``On boundedness of solutions of functional differential systems with infinite delay'', Appl. Anal. , 70, (1999), 269-280.

Xilin Fu and Xinzhi Liu, ``Uniform boundedness and stability criteria in terms of two measures for impulsive integro-differential equations'', Appl. Math. Comp., 102, (1999), 237-255.

Shenghai Zhang, H.I. Freedman and Xinzhi Liu, ``Analysis of a population model with space-dependent recruitment in continuous time'', J. Math. Anal. Appl., 232, 99-118 (1999).

Xinzhi Liu and Xilin Fu, ``High order nonlinear differential inequalities with distributed arguments and applications'', Applied Math. Comp., 98, (1999), 147-167.

Xinzhi Liu and Shenghai Zhang, ``A cell population model described by impulsive PDEs-existence and numerical approximation'', Computers and Mathematics with Applications, 36, (1998), 1-11.

Xinzhi Liu and Dajun Guo, Periodic boundary value problems for impulsive integrodifferential equations in Banach spaces'', Chin. Ann. Math., 19B, (1998), 517-528.

Daoyi Xu and Xinzhi Liu, "Robust delay-dependent stability for linear systems with nonlinear parametric perturbations, Control Theory Appl., 15, (1998), 501-506.

Xinzhi Liu and Xilin Fu, ``Stability criteria on terms of two measures for discrete systems'', Computers and Mathematics with Applications, 36, (1998), 327-337.

Xinzhi Liu and K. Rohlf, ``Impulsive control of Lotka-Voterra models'', IMA J. Math. Contr. Infor., 15, (1998) 269-284.

Xinzhi Liu and Xilin Fu, ``Oscillation criteria for high order delay partial differential equations'', JAMSA, 11, (1998) 193-208.

Xinzhi Liu and A.S. Vatsala, ``Variation of parameters in terms of Lyapunov-like functions and stability of perturbed systems'', Nonlinear Studies, 5, 47-58 (1998).

V. Lakshmikantham and Xinzhi Liu, ``Impulsive hybrid systems and stability theory'', Dynamic Systems and Appl., 7, 1-9 (1998).

V. Lakshmikantham, Xinzhi Liu and S. Leela, ``Variational Lyapunov method and stability theory'', Math. Problems in Engineering, 3, 555-571 (1998).

Xinzhi Liu, ``Boundedness in terms of two measures and permanence of population growth models'', Nonlinear Anal. TMA, 30, 2711-2723 (1997).

Xinzhi Liu and Daoyi Xu, "Uniform asymptotic stability of abstract functional differential equations", J. Math. Anal. Appl., 216, 626-643 (1997).

Xinzhi Liu, ``Periodic boundary value problems for impulsive systems containing Hammerstein type integrals'', Dynamic Systems Appl., 6, 517-527 (1997).

Xinzhi Liu and G. Ballinger,`` On boundedness of solutions of impulsive systems in terms of two measures,'' Nonlinear World, 4, 417-434 (1997).

George Ballinger and Xinzhi Liu, ``Permanence of population growth models with impulsive effects'', Math. Comput. Modeling, 26, 59-72 (1997).

George Ballinger and Xinzhi Liu, `` On boundedness of solutions of impulsive systems'', Nonlinear Studies, Vol. 4, (1997) 121-131.

Xinzhi Liu and Dajun Guo,``Periodic boundary value problems for a class of second order impulsive integro-differential equations in Banach spaces'', J. Math. Anal. Appl., 216, 284-302 (1997).

Xilin Fu and Xinzhi Liu,``Oscillation criteria for impulsive hyperbolic systems' ', DCDIS, Vol. 3, (1997) 225-244.

Xinzhi Liu and Dajun Guo, `` Periodic boundary value problems for impulsive integro-differential equations in Banach spaces'', Nonlinear World, Vol. 3, (1996) 427-441.

Dajun Guo and Xinzhi Liu, ``First order impulsive integro-differential equations on unbounded domain in a Banach space'', DCDIS, Vol.2, (1996)381-394.

Dajun Guo and Xinzhi Liu, ``Impulsive integro-differential equations on unbounded domain in a Banach space'', Nonlear Studies , Vol3, (1996) 49-57.

Xilin Fu and Xinzhi Liu, ``Oscillation criteria for nonlinear inhomogeneous hyperbolic equations with distributed deviating arguments'', JAMSA, Vol. 9, (1996)211-31.

Xinzhi Liu and A. R. Willms, ``Impulsive controllability of linear dynamical systems with applications to maneuvers of spacecraft'', Math. Problems in Engineering, Vol. 2, (1996) 277-299.

Xinzhi Liu and Dajun Guo, ``Initial value problems for first order impulsive integro-diffential equations in Banach spaces'', Comm. Appl. Anal, Vol. 2, (1995)65-83.

Xinzhi Liu, ``Periodic boundary value problems for first order impulsive integro-differential equations'', Nonlinear Times & Digest, Vol. 2, (1995) 69-82.

Xilin Fu and Xinzhi Liu,``Oscillation criteria for a class of nonlinear neutral parabolic partial differential equations'', Appl. Anal., Vol. 58, (1995) 215-228.

Xinzhi Liu, ``Impulsive control and optimization'', Appl. Math. Comp., Vol. 73, (1995) 47-78.

Xinzhi Liu, ``Numerical methods for convection dominated parabolic problems: a monotone iterative approach'', Neural, Parallel Sci. Comp., Vol. 3, (1995) 129-150.

Xinzhi Liu and Allan Willms, ``Stability analysis and applications to large scale impulsive systems: a new approach'', Can. Appl. Math. Qua., Vol. 3, (1995) 419-444.

Xinzhi Liu and Dajun Guo, ``Extremal solutions of nonlinear impulsive Fredholm integral equations in Banach spaces and applications'', Diff. Equs. Dynam. Syst., Vol. 3, (1995) 77-88.

Xinzhi Liu and S. Sivasundaram, ``Stability of nonlinear systems under constantly acting perturbations'', Inte. J. Math. & Math. Sci., Vol. 18, (1995)273-278.

Dajun Guo and Xinzhi Liu, ``Multiple positive solutions of boundary value problems for impulsive differential equations'', Nonlinear Anal. TMA, Vol. 25, (1995) 327-337.

Xinzhi Liu and S. Sivasundaram, ``Method of vector Lyapunov functions for delay differential equations'', Commu. Appl. Anal., Vol. 2, (1995) 47-61.

Xinzhi Liu, ``Further extensions of the direct method and stability of impulsive systems'', Nonlinear World, Vol. 1, (1994) 341-354.

Xinzhi Liu and Xilin Fu,``Nonlinear differential inequalities with distributed deviating arguments and applications'', Nonlinear World,Vol. 1, (1994) 409-427.

Xinzhi Liu,``Periodic boundary value problems for differential equations with finite delay'', Dynamic Syst. Appl., Vol. 3, (1994) 357-368.

Xinzhi Liu, ``Stability analysis of large scale integrodifferential systems'', J. Math. Anal. Appl., Vol. 187, (1994) 17-39.

Xinzhi Liu and A. R. Willms, ``Impulsive stabilizability of autonomous systems'', J. Math. Anal. & Appl., Vol. 187, (1994)17-39.

Xiaodong Lin and Xinzhi Liu, ``Qualitative study of an HIV transmission model among IV drug users'', Appl. Math. & Comp., Vol. 60, (1994) 215-236 .

Xinzhi Liu, ``Stability results for impulsive differential systems with applications to population growth models'', Dynamics and Stability of Systems, Vol. 9, (1994) 163-174.

Xinzhi Liu, ``Impulsive stabilization of nonlinear systems'', IMA J. Math. Control & Information, Vol. 10, (1993) 11-19.

Xinzhi Liu and J. Yu and B.G. Zhang, ``Oscillation and nonoscillation for a class of neutral differential equations'', Pan Amer. Math. J. Vol. 3, (1993) 23-32.

Dajun Guo and Xinzhi Liu, ``Extremal solutions of nonlinear impulsive integro-differential equations in Banach spaces'', J. Math. Anal. Appl., Vol. 177, (1993) 538-552 .

Xinzhi Liu, ``Stability analysis of impulsive systems via perturbing families of Lyapunov functions'', Rocky Mountain J. Math., Vol. 23, (1993) 651-670.

Xinzhi Liu, ``On attractivity for nonautonomous systems'', Quarterly of Applied Math., Vol. 51, (1993) 319-328.

Xinzhi Liu and S. Sivasundaram, ``On the direct method of Lyapunov in terms of two measures'', J. Math. Phy. Sci.,Vol. 26, (1992) 381-400.

Xinzhi Liu,``On -stability of autonomous systems``, J. Appl. Math. & Stochastic Anal., Vol. 4, No. 4, (1992) 331-338.

Xinzhi Liu, ``Boundedness and Lagrange stability theory for functional differential systems'', Pan Amer. Math. J., Vol 2, (1992) 79-100.

Xinzhi Liu, ``Iterative methods for impulsive functional systems'', Appl. Anal., Vol. 44, (1992) 171-182.

Xinzhi Liu, ``Practical stabilization of control systems with impulse effects'', J. Math. Anal. & Appl., Vol. 166, (1992) 563-576.

Xinzhi Liu, Yau Shu Wong and Ji Xingzhi, ``Monotone iterations for numerical solutions of nonlinear elliptic partial differential equations'', Appl. Math. & Comp., Vol. 50, (1992) 59-91.

L.H. Erbe, Dajun Guo and Xinzhi Liu, ``Positive solutions of integral equations with applications'', J. Integral Equs. & Appl., Vol. 4, (1992) 179-195.

Xinzhi Liu,``Stability analysis for impulsive differential equations in terms of two measures'', Ann. Diff. Equs., Vol. 7, (1991) 191-203.

L.H. Erbe and Xinzhi Liu, ``Monotone iterative methods for differential systems with finite delays, Appl. Math. & Comp., Vol. 43, (1991) 43-63.

L.H. Erbe and Xinzhi Liu, ``Existence of periodic solutions of impulsive differential systems'', J. Appl. Math. & Stochastic Anal., Vol. 4, (1991) 137-146.

L.H. Erbe, H.I. Freedman, Xinzhi liu and Jianhong Wu, ``Comparison principles of parabolic equations with impulsive effect and their applications to population dynamics'', J. Australian Math. Society: Series B., Vol. 32, (1991) 382-400.

L.H. Erbe and Xinzhi Liu, ``On asymptotic stability for functional differential system'', J. Math. Phy. Sci., Vol. 25, No. 2, (1991) 87-98.

L.H. Erbe and Xinzhi Liu, ``Nonoscillation criteria for Emden-Fowler systems'', Bulletin of the Australian Math. Society, Vol. 42, (1990) 455-464.

L.H. Erbe and Xinzhi Liu, ``Boundary value problems of nonlinear impulsive integro-differential equations'', Appl. Math. & Comp., Vol. 36, (1990) 31-50.

L.H. Erbe, Xinzhi Liu and Jianhong Wu, ``Solvability of boundary value problems for vector differential systems'', Proceedings of the Royal Society Edinburgh, Vol. 114A, (1990) 181-193.

L.H. Erbe and Xinzhi Liu, ``Existence results for boundary value problems of second order impulsive differential equations'', J. Math. Anal. & Appl., Vol. 149, (1990) 56-69.

Xinzhi Liu, ``Monotone iterative technique for impulsive differential equations in a Banach space'', J. Math. Phy. Sci., Vol. 24, (1990) 183-191.

L.H. Erbe and Xinzhi Liu, ``Quasi-solutions of nonlinear impulsive equations in abstract cones'', Appl. Anal., Vol. 34, (1989) 231-250.

V. Lakshmikantham, Xinzhi Liu and S. Sathananthan, ``Impulsive integro-differential equations and extension of Lyapunov's method'', Appl. Anal. Vol. 32, (1989) 203-214.

Xinzhi Liu, ``Nonlinear boundary value problems for first order impulsive integro-differential equations'', J. Appl. Math. & Simulation, Vol. 2, No. 3, (1989) 185-198.

V. Lakshmikantham and Xinzhi Liu, ``On asymptotic stability for nonautonomous differential systems'', Nonlinear Anal., TMA, Vol. 13, No. 10, (1989) 1181-1189.

Xinzhi Liu and R. Pirapakaran, ``Global stability results for impulsive differential equations'', Appl. Anal., Vol. 33, No. 1, (1989) 87-102.

V. Lakshmikantham and Xinzhi Liu, ``On quasi stability for impulsive differential systems'', Nonlinear Anal., TMA, Vol. 13, No. 7, (1989) 819-828.

V. Lakshmikantham and Xinzhi Liu, ``Perturbing families of Lyapunov functions and stability in terms of two measures'', J. Math. Anal. & Appl., Vol. 140, No. 1, (1989) 107-114.

Xinzhi Liu and R. Pirapakaran, ``Asymptotic stability for impulsive differential systems'', J. Appl. Math. & Comp., Vol. 30, No. 3, (1989) 149-163.

Xinzhi Liu, ``Perturbing families of Lyapunov functions and asymptotic stability'', Appl. Math. Phy. Sci., Vol. 23, No. 1, (1989) 23-34.

V. Lakshmikantham and Xinzhi Liu, ``Stability criteria for impulsive differential equations in terms of two measures'', J. Math. Anal. & Appl., Vol. 137, No. 2, (1989) 591-604.

V. Lakshmikantham and Xinzhi Liu, ``Stability in terms of two measures for differential equations with impulse effects'', J. Appl. Math. & Comp., Vol. 29, No. 1, (1989) 89-98.

Xinzhi Liu, ``Stability in terms of two measures for functional differential equations'', J. Diff. & Inte. Equs., Vol. 1, No. 1, (1989) 13-21.

Xinzhi Liu, ``Quasi stability and Lyapunov functions'', Appl. Anal. Vol. 31, No. 3, (1988) 201-213.

PUBLICATIONS IN REFEREED CONFERENCE PROCEEDINGS:

Xinzhi Liu, ``Some recent contributions to impulsive functional differential equations,'' Differential Equations and Computational Simulations, (2000) 243-253, World Sci. Publishing, River Edge Singapore.

Xinzhi Liu, ``Extremal solutions of impulsive integrodifferential equations of Volterra type'', Stability Control Theory Methods Appl., 10, (2001) 317-324.

Xinzhi Liu, ``A generalization of variation of parameters and Lyapunov's method'', Fields Institute Communications, 21, (1999) 377-385.

Xinzhi Liu, ``Advances in stability theory of nonlinear systems'', J. Shanghai Jiaotong University, E-3, (1998) 97-107.

Xinzhi Liu, ``Existence criteria of solutions of impulsive integro-differential equations in Banach spaces'', Dynamical Systems and Diff. Equs., 2, ed. W. Chen and S. Hu, 87-102 (1998).

G. Ballinger and Xinzhi Liu, `` Boundedness criteria in terms of two measures for impulsive systems'', Dynamical Systems and Diff. Equs., 1, ed. W. Chen and S. Hu, 79-88 (1998).

Daoyi Xu and Xinzhi Liu, ``Robustness of delay differential systems'', Proceedings of the 2nd Chinese World Congress on Intelligent Control and Intelligent Automation, Xi'an Jiaotong University Press, (1997) 1001-1006.

Xinzhi Liu, ``Stability problems of impulsive systems'', Diff. Equs. & and Control Theory, ed. by Z.Deng, Z. Liang, G. Lu and S. Ruan, Marcel Dekker, New York, (1996) 187-201.

Xinzhi Liu, ``Uniform stability of impulsive systems'', Dynamic Systems and Appl., ed. by G.S. Ladde and M. Sambandham, Dynamic Publishers, (1996) 349-358.

Xinzhi Liu, ``Monotone iterations for numerical solutions of nonlinear convection-diffusion equation'', Proceedings of the Third International Colloquium on Numerical Analysis, ed. by D. Bainov and V. Covachev, VSP International Publishers, The Netherlands, (1995) 117-122.

Xinzhi Liu, ``Stability of Large scale impulsive systems'', Proceedings of the Fifth International Colloquium on Diff. Equs., ed. by D. Bainov and V. Covachev, VSP International Publishers, The Netherlands, (1995) 193-204.

Xinzhi Liu, ``Impulsive stabilization and applications to population growth models'', Rocky Mountain J. Math., 25, (1995) 381-395.

Xinzhi Liu, ``Monotone iterative method for second order impulsive differential equations'', Trends and Developments in Ordinary Diff. Equs., ed. by Y. Alavi and P-F. Hsieh, World Scientific (1994) 221-230.

Xinzhi Liu and Allan Willms``Impulsive stabilization'', Comparison Methods and Stability Theory, ed. by X.Z. Liu and D. Siegel, Marcel Dekker, New York, (1994) 269-276.

Ying Chen and Xinzhi Liu, ``Monotone iterative algorithms for coupled systems on nonlinear parabolic boundary value problems'', Comparison Methods and Stability Theory, ed. by X.Z. Liu and D. Siegel, Marcel Dekker, New York, (1994) 57-67.

Xinzhi Liu, ``Monotone iterations for numerical solutions of nonlinear convection-diffusion equations'', Scientific and Engineering Computing, ed. by J. Cui, National Defence Industry Press, Beijing, (1994) 192-196.

Xinzhi Liu, ``Stability analysis of an HIV transmission model'', Proceedings of the First World Congress of Nonlinear Analysts, Walter de Gruyter, Berlin, (1993) 1313-1324.

Xinzhi Liu, ``Asymptotic behaviour of solutions of nonlinear differential equations'', Ordinary & Delay Diff. Equs., ed. by J. Wiener and J. Hale, Longman, (1992) 134-139.

Xinzhi Liu, ``On attractivity for nonautonomous differential systems'', Diff. Equs., ed. by D. Bainov and V. Covachev, World Scientific, (1992) 123-132.

Xinzhi Liu, ``Stability theory for impulsive differential equations in terms of two measures'', Diff. Equs., ed. by S. Elaydi, Marcel Dekker, (1990) 61-70.

Xinzhi Liu and V. Lakshmikantham, ``Stability in terms of two measures for ordinary differential equations'', Diff. Equs. & Appl., ed. by R. Aftabizadeh, Ohio University Press, (1989) 88-92.

MONOGRAPHS, BOOKS AND BOOK CHAPTERS:

V. Lakshmikantham and Xinzhi Liu, ``Stability Analysis in Terms of Two Measures'', World Scientific, Singapore, 1993, (Research monogragh, 402 pages).

D. Guo, V. Lakshmikantham and Xinzhi Liu, ``Nonlinear Integral Equations in Abstract Spaces'', Kluwer Academic Publishers, 1996, (Research monogragh, 341 pages).

Xinzhi Liu and D. Siegel, ``Comparison Methods and Stability Theory'', Marcel Dekker, New York, 1994 (Proceedings, 365 pages).

Xinzhi Liu and D. Siegel, ``Differential Equations and Dynamical Systems'', Watam Press, Waterloo, 1999 (Proceedings, 597 pages).

Xinzhi Liu, ``Advances in Impulsive Differential Equations'', Watam Press, Waterloo, 2002 (a special issue).

George Ballinger and Xinzhi Liu, ``Optimization Methods and Applications,'' ed. K.L. Teo and X.Q. Yang, Chapter 1: ``Practical stability of impulsive delay differential equations and applications to control problems,'' pp. 3-21, Appl. Optim., 52, Kluwer Acad. Publ., Dordrecht, 2001.

Xinzhi Liu, ``Integral and Integrodifferential Equations,'' ed. R.P. Agawal, Chapter 14: `` Periodic boundary value problems for first-order impulsive integro-differential equations in abstract spaces'', pp. 185-200, Ser. Math. Anal. Appl., 2, Gordon & Breach, Amsterdam, 2000.

Xinzhi Liu, ``Advances in Nonolinear Dynamics'', ed. A.A. Martyynuk and S. Sivasundaram, Chapter 11: ``Uniform boundedness for impulsive systems of integro-differential equations'', pp. 93-98, , Stability and Control, 5, Gordon & Breach, Amsterdam, 1997.