%0 Journal Article
%A S. G. Gindikin
%T A certain class of differential operators that admit a two-sided energy estimate
%J Trudy Matematicheskogo Instituta imeni V.A. Steklova
%D 1973
%V 28
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RM_1973_28_6_a14/
%G ru
%F RM_1973_28_6_a14