%0 Journal Article
%A A. Ya. Lepin
%T Existence of solutions of boundary value problems for a second-order equation
%J Differencialʹnye uravneniâ
%D 1990
%P 1729-1737
%V 26
%N 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1990_26_10_a9/
%G ru
%F DE_1990_26_10_a9