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
C.Crus-Hernandez — Ensenada, Mexico
Peng Shi — Pontypridd, United Kingdom
K.L. Teo — Perth, Australia
Jianhong Wu — York University, Toronto, Canada

EDITORIAL BOARD

Artstein, Z. (Israel)
Bajodah, A.H. (Saudi Arabia)
Bohner, M. (USA)
Boukas, E.K. (Canada)
Chen Ye-Hwa (USA)
D'Anna, A. (Italy)
Dauphin-Tanguy, G. (France)
Dshalalow, J.H. (USA)
Eke, F.O. (USA)
Fabrizio, M. (Italy)
Freedman, H.I. (Canada)
Gao, H. (China)
Georgiou, G. (Cyprus)
Guang-Ren Duan (China)
Hai-Tao Fang (China)
Izobov, N.A. (Belarussia)
A.D.C.Jesus (Brazil)
Khusainov, D.Ya. (Ukraine)
Kloeden, P. (Germany)
Larin, V.B. (Ukraine)

Leela, S. (USA)
Leonov, G.A. (Russia)
Limarchenko, O.S. (Ukraine)
Loccufier, M. (Belgium)
Mawhin, J. (Belgium)
Mazko, A.G. (Ukraine)
Michel, A.N. (USA)
Nguang Sing Kiong (New Zealand)
Prado, A.F.B.A. (Brazil)
Shi Yan (Japan)
Siafarikas, P.D. (Greece)
Siljak, D.D. (USA)
Sira-Ramirez, H. (Mexico)
Sontag, E.D. (USA)
Sree Hari Rao, V. (India)
Stavrakakis, N.M. (Greece)
Tonkov, E.L. (Russia)
Vatsala, A. (USA)
Wuyi Yue (Japan)
Zhai, G. (Japan)

INFORMATH PUBLISHING GROUP

Arlington + Ensenada + Lille + Perth + Pontypridd + Toronto
Head Office: S. P. Timoshenko Institute of Mechanics NAS of Ukraine
Nesterov str., 3, 03057, Kiev-57, Ukraine
Email: anmart@stability. kiev.ua