%0 Journal Article
%A Ren, Zhiguo
%A Li, Jie
%A Shi, Haiping
%T Existence of periodic solutions for second-order nonlinear difference equations 
%J Journal of nonlinear sciences and its applications
%D 2016
%P 1505-1514
%V 9
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.22436/jnsa.009.04.09/
%R 10.22436/jnsa.009.04.09
%G en
%F JNSA_2016_9_4_a8