TY  - JOUR
AU  - Yongkun Li
AU  - Changzhao Li
AU  - Juan Zhang
TI  - Three  periodic solutions for a class of
higher-dimensional functional differential equations with
impulses
JO  - Annales Polonici Mathematici
PY  - 2010
SP  - 169
EP  - 183
VL  - 97
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/ap97-2-6/
DO  - 10.4064/ap97-2-6
LA  - en
ID  - 10_4064_ap97_2_6
ER  -