TY  - JOUR
AU  - Ren, Zhiguo
AU  - Li, Jie
AU  - Shi, Haiping
TI  - Existence of periodic solutions for second-order nonlinear difference equations 
JO  - Journal of nonlinear sciences and its applications
PY  - 2016
SP  - 1505
EP  - 1514
VL  - 9
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.22436/jnsa.009.04.09/
DO  - 10.22436/jnsa.009.04.09
LA  - en
ID  - JNSA_2016_9_4_a8
ER  -