%0 Journal Article
%A R. G. Dymanov
%T Singular points for two-dimensional systems of total differential equations in four-dimensional space
%J Differencialʹnye uravneniâ
%D 1968
%P 1835-1841
%V 4
%N 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1968_4_10_a7/
%G ru
%F DE_1968_4_10_a7