%0 Journal Article %A Jia, Mei %A Wang, Pingyou %T Multiple positive solutions for integro-differential equations with integral boundary conditions and sign changing nonlinearities %J Electronic Journal of Differential Equations %D 2012 %V 2012 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2012__2012__a32/ %G en %F EJDE_2012__2012__a32