%0 Journal Article
%A L. V. Trigubovich
%T The periodic solutions of second and third order linear systems
%J Differencialʹnye uravneniâ
%D 1971
%P 1007-1011
%V 7
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1971_7_6_a6/
%G ru
%F DE_1971_7_6_a6