Association Journal of CSIAM
Supervised by Ministry of Education of PRC
Sponsored by Xi'an Jiaotong University
ISSN 1005-3085  CN 61-1269/O1
Chinese Journal of Engineering Mathematics
Existence of Periodic Solutions of Fourth-order Nonlinear Difference Equations
WU Yun-zong, SHI Hai-ping, GUO Cheng-jun
Chinese Journal of Engineering Mathematics . 2015, (4): 568 -576 .  DOI: 10.3969/j.issn.1005-3085.2015.04.010