%0 Journal Article
%A V. N. Laptinskii
%T A certain matrix method in the theory of oscillations
%J Differencialʹnye uravneniâ
%D 1971
%P 1819-1824
%V 7
%N 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1971_7_10_a7/
%G ru
%F DE_1971_7_10_a7