%0 Journal Article
%A V. N. Laptinskii
%A V. V. Pugin
%T First order nonlinear matrix-valued differential equations
%J Differencialʹnye uravneniâ
%D 1969
%P 1523-1525
%V 5
%N 8
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1969_5_8_a19/
%G ru
%F DE_1969_5_8_a19