%0 Journal Article
%A B. S. Kalitin
%T Pseudostability and first prolongations
%J Differencialʹnye uravneniâ
%D 1988
%P 571-574
%V 24
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1988_24_4_a3/
%G ru
%F DE_1988_24_4_a3