%0 Journal Article %A A. Lasota %A Z. Opial %T On the existence and uniqueness of solutions of a boundary value problem for an ordinary second-order differential equation %J Colloquium Mathematicum %D 1967 %P 1-5 %V 18 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-18-1-1-5/ %R 10.4064/cm-18-1-1-5 %G en %F 10_4064_cm_18_1_1_5