%0 Journal Article
%A Ruyun Ma
%T Existence of positive solutions for a nonlinear fourth order
 boundary value problem
%J Annales Polonici Mathematici
%D 2003
%P 79-84
%V 81
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/ap81-1-7/
%R 10.4064/ap81-1-7
%G en
%F 10_4064_ap81_1_7