TY - JOUR AU - Jia, Mei AU - Wang, Pingyou TI - Multiple positive solutions for integro-differential equations with integral boundary conditions and sign changing nonlinearities JO - Electronic Journal of Differential Equations PY - 2012 VL - 2012 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/EJDE_2012__2012__a32/ LA - en ID - EJDE_2012__2012__a32 ER -