%0 Journal Article
%A He, Xiaoming
%A Ge, Weigao
%T Positive solutions for semipositone  boundary value problems.
%J Portugaliae mathematica
%D 2003
%P 253-262
%V 60
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/PORMA_2003__60_3_51141/
%G en
%F PORMA_2003__60_3_51141