%0 Journal Article
%A S. G. Krein
%A G. I. Laptev
%T Correctness of boundary value problems for a differential equation of the second order in a Banach space. II
%J Differencialʹnye uravneniâ
%D 1966
%P 919-926
%V 2
%N 7
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1966_2_7_a5/
%G ru
%F DE_1966_2_7_a5