[] NONLINEAR DYNAMICS AND SYSTEMS THEORY is an international journal published under the auspices of the S. P. Timoshenko Institute of Mechanics NAS of Ukraine and the Laboratory for Industrial and Applied Mathematics (LIAM) at York University (Toronto, Canada) Regional Editors: Pierre Borne — Ecole Centralle de Lille, Lille, France Constantine Corduneanu — University of Texas at Arlington, Arlington, USA Antônio D.C. de Jesus — Universidade Estadual de Feira de Santana, Brasil Peng Shi — Pontypridd, United Kingdom K.L. Teo — Perth, Australia Jianhong Wu — York University, Toronto, Canada Editorial Board: Artstein, Z. (Israel) Azbelev, N.V. (Russia) Chen Han-Fu (China) Cruz-Hernandez, C. (Mexico) D'Anna, A. (Italy) Dauphin-Tanguy, G. (France) Dzhalalow, J.H. (USA) Eke, F.O. (USA) Fabrizio, M. (Italy) Freedman, H.I. (Canada) Georgiou, G. (Cyprus) Hatvani, L. (Hungary) Ikeda, M. (Japan) Izobov, N.A. (Belarassia) Khusainov, D.Ya. (Ukraine) Kuepper, T. (Germany) Larin, V.B. (Ukraine) Leela, S. (USA) Limarchenko, O.S. (Ukraine) Mawhin, J. (Belgium) Mazko, A.G. (Ukraine) Michel, A.N. (USA) Miladzhanov, V.G. (Uzbekistan) Nguang Sing Kiong (New Zealand) Noldus, E. (Belgium) Ortega, R. (Spain) Perel, V. (USA) Pilipchuk, V.N. (USA) Prado, A.F.B.A. (Brazil) Shi Yan (Japan) Siafarikas, P.D. (Greece) Siljak, D.D. (USA) Sivasundaram, S. (USA) Sree Hari Rao, V. (India) Stavrakakis, N.M. (Greece) Sun Zhen qi (China) Vincent, T. (USA) Wai Rong-Jong (Taiwan) INFORMATH PUBLISHING GROUP Arlington + Feira de Santana + Perth + Toronto Head Office: S. P. Timoshenko Institute of Mechanics NAS of Ukraine Nesterov str., 3, 03057, Kiev-57, Ukraine Email: anmart@stability. kiev.ua Home Page | Regional Editors | Aims and Scope | Table of Contents Instruction Information | Subscription Information | Call for Papers Guest Book | Contacts Design by: Evgeniy Petrenko