On Periodic Solution of Nonconservative Systems
Li Weiguo, Chen Kunting
Chinese Quarterly Journal of Mathematics . 1997, (3): 45 -49 . 

Copyright © Chinese Quarterly Journal of Mathematics, All Rights Reserved.
Tel: 0371-23881698　E-mail: sxjk@henu.edu.cn　QQ: 2454327236
Powered by Beijing Magtech Co., Ltd.