%0 Journal Article
%A G. G. Kazaryan
%T Estimates of differential operators, and hypoelliptic operators
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1976
%P 130-161
%V 140
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TM_1976_140_a6/
%G ru
%F TM_1976_140_a6