%0 Journal Article
%A V. S. Mokeichev
%T Periodic boundary value problems for certain differential equations
%J Differencialʹnye uravneniâ
%D 1969
%P 2087-2092
%V 5
%N 11
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1969_5_11_a14/
%G ru
%F DE_1969_5_11_a14