%0 Journal Article %A Greguš, Michal, Jr. %T The existence of a solution of a nonlinear boundary value problem %J Mathematica slovaca %D 1980 %P 127-132 %V 30 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_1980__30_2_a3/ %G en %F MASLO_1980__30_2_a3