%0 Journal Article
%A M. I. Vishik
%A V. V. Grushin
%T Elliptic pseudodifferential operators on a closed manifold which are degenerate on a submanifold
%J Doklady Akademii Nauk
%D 1969
%P 16-19
%V 189
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1969_189_1_a2/
%G ru
%F DAN_1969_189_1_a2