%0 Journal Article
%A V. S. Mokeichev
%T A criterion for the solvability of certain periodic boundary value problems
%J Differencialʹnye uravneniâ
%D 1977
%P 1335-1337
%V 13
%N 7
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1977_13_7_a24/
%G ru
%F DE_1977_13_7_a24