Editor-in-Chief:
A.A.Martynyuk
S. P. Timoshenko Institute of Mechanics
National Academy of Sciences of Ukraine,
Nesterov str. 3, 03057, Kiev-57, Ukraine
E-mail:anmart@stability.kiev.ua

Managing Editor:
Ioannis P. Stavroulakis
Department of Mathematics
University of Ioannina,
451 10 Ioannina, Greece
E-mail:ipstav@cc.uoi.gr

Honorary Editors:
Vangipuram Lakshmikantham
Florida Institute of Technology
Melbourne, FL, USA
Yurii A.Mitropolskii
Institute of Mathematics
NAS of Ukraine, Kiev, Ukraine