%0 Journal Article
%A V. A. Marchenko
%T Some questions of the theory of one-dimensional linear differential operators of the second order.~I
%J Trudy Moskovskogo matematičeskogo obŝestva
%D 1952
%P 327-420
%V 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MMO_1952_1_a6/
%G ru
%F MMO_1952_1_a6