%0 Journal Article
%A G. A. Smolkin
%T On the hypoellipticity of a~special class of differential operators
%J Matematičeskoe modelirovanie
%D 1995
%P 63
%V 7
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MM_1995_7_5_a36/
%G ru
%F MM_1995_7_5_a36