TY  - JOUR
AU  - Li, Yongkun
AU  - Zhang, Tianwei
AU  - Suo, Jianfeng
TI  - Existence of three positive periodic solutions for differential systems with feedback controls on time scales
JO  - Electronic Journal of Differential Equations
PY  - 2010
VL  - 2010
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/EJDE_2010__2010__a248/
LA  - en
ID  - EJDE_2010__2010__a248
ER  -