%0 Journal Article
%A S. K. Norkin
%T The problem of discrimination for the normal domain $N_4$ in the space $R^3$
%J Differencialʹnye uravneniâ
%D 1976
%P 263-271
%V 12
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1976_12_2_a8/
%G ru
%F DE_1976_12_2_a8