%0 Journal Article
%A È. I. Grudo
%T Characteristic vectors of the solutions of linear homogeneous Pfaffian systems
%J Differencialʹnye uravneniâ
%D 1977
%P 826-840
%V 13
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1977_13_5_a3/
%G ru
%F DE_1977_13_5_a3