TY - JOUR AU - Zhou, Zheng AU - Zhang, Zhengqiu TI - Existence and global attractivity positive periodic solutions for a discrete model JO - Electronic Journal of Differential Equations PY - 2006 VL - 2006 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/EJDE_2006__2006__a100/ LA - en ID - EJDE_2006__2006__a100 ER -