%0 Journal Article
%A A. K. Demenchuk
%T Necessary and sufficient conditions for the existence of periodic solutions of linear nonhomogeneous Pfaffian systems
%J Differencialʹnye uravneniâ
%D 1997
%P 155-157
%V 33
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1997_33_2_a1/
%G ru
%F DE_1997_33_2_a1