%0 Journal Article
%A V. G. Bardakov
%T The classification of differential equations with two independent variables on the basis of the principal part
%J Differencialʹnye uravneniâ
%D 2000
%P 187-197
%V 36
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_2000_36_2_a6/
%G ru
%F DE_2000_36_2_a6