%0 Journal Article %A McCandless, W. L. %T An Existence Theorem for Nonlinear Boundary Value Problems %J Canadian mathematical bulletin %D 1975 %P 693-701 %V 17 %N 5 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1974-126-3/ %R 10.4153/CMB-1974-126-3 %F 10_4153_CMB_1974_126_3