%0 Journal Article
%A È. I. Grudo
%T Characteristic vectors and sets of functions of two variables and their fundamental properties
%J Differencialʹnye uravneniâ
%D 1976
%P 2115-2128
%V 12
%N 12
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1976_12_12_a0/
%G ru
%F DE_1976_12_12_a0