%0 Journal Article
%A V. Lakshmikantham
%A S. Leela
%T On the method of upper and lower solutions in abstract cones
%J Annales Polonici Mathematici
%D 1983
%P 159-164
%V 42
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/ap-42-1-159-164/
%R 10.4064/ap-42-1-159-164
%G en
%F 10_4064_ap_42_1_159_164