TY - JOUR AU - Zhang, Xingqiu TI - Existence of positive solutions for boundary value problems of second-order nonlinear differential equations on the half line JO - Electronic Journal of Differential Equations PY - 2009 VL - 2009 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/EJDE_2009__2009__a50/ LA - en ID - EJDE_2009__2009__a50 ER -