%0 Journal Article %A Tineo, Antonio %T Existence of solutions for a class of boundary value problems for the equation $x''=F(t, x, x', x'')$ %J Commentationes Mathematicae Universitatis Carolinae %D 1988 %P 285-291 %V 29 %N 2 %U http://geodesic.mathdoc.fr/item/CMUC_1988_29_2_a11/ %G en %F CMUC_1988_29_2_a11