%0 Journal Article
%A Costa, David G.
%A Tehrani, Hossein
%A Yang, Jianfu
%T On a variational approach to existence and multiplicity results for semipositone problems
%J Electronic Journal of Differential Equations
%D 2006
%V 2006
%I mathdoc
%U http://geodesic.mathdoc.fr/item/EJDE_2006__2006__a192/
%G en
%F EJDE_2006__2006__a192