%0 Journal Article
%A È. M. Saak
%T Fredholm property of a class of boundary value problems
%J Differencialʹnye uravneniâ
%D 1980
%P 507-515
%V 16
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1980_16_3_a14/
%G ru
%F DE_1980_16_3_a14