%0 Journal Article %A A. Ya. Lepin %A A. D. Myshkis %T Existence of solutions of a boundary value problem for an ordinary nonlinear differential equation of the $n$th order %J Doklady Akademii Nauk %D 1966 %P 16-19 %V 169 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1966_169_1_a2/ %G ru %F DAN_1966_169_1_a2