TY - JOUR AU - Ma, Shuang-Hong AU - Sun, Jian-Ping AU - Wang, Da-Bin TI - Existence of positive solutions for nonlinear dynamic systems with a parameter on a measure chain JO - Electronic Journal of Differential Equations PY - 2007 VL - 2007 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/EJDE_2007__2007__a127/ LA - en ID - EJDE_2007__2007__a127 ER -