Periodic Solution for a Class of Non-Autonomous Second Order Systems
JIA Hong-en1, LIU Xi-lan2
1. School of Scienees, Xi＇an Jiaotong University, Shanxi Xi＇an 710049, China; 2. Department of Mathematics, Shanxi Datong University, Shanxi Datong 037009, China
JIA Hong-en, LIU Xi-lan. Periodic Solution for a Class of Non-Autonomous Second Order Systems[J]. Journal of Chongqing Jiaotong University(Natural Science), 2009, 28(2): 330-332.
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