%0 Journal Article
%A Yu. V. Egorov
%T Hypoelliptic pseudodifferential operators
%J Doklady Akademii Nauk
%D 1966
%P 1242-1244
%V 168
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1966_168_6_a4/
%G ru
%F DAN_1966_168_6_a4