%0 Journal Article %A McCandless, W. L. %T Existence Theorems for Nonlinear Boundary Value Problems %J Canadian journal of mathematics %D 1974 %P 884-892 %V 26 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1974-083-4/ %R 10.4153/CJM-1974-083-4 %F 10_4153_CJM_1974_083_4