%0 Journal Article
%A B. R. Vainberg
%A V. V. Grushin
%T Uniformly nonelliptic problems. II
%J Sbornik. Mathematics
%D 1967
%P 111-133
%V 2
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1967_2_1_a7/
%G en
%F SM_1967_2_1_a7