%0 Journal Article
%A A. A. Dezin
%T Natural differential operators and the separation of variables
%J Differencialʹnye uravneniâ
%D 1973
%P 25-31
%V 9
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1973_9_1_a3/
%G ru
%F DE_1973_9_1_a3