%0 Journal Article
%A G. I. Èskin
%T Degenerate elliptic pseudodifferential equations of principal type
%J Sbornik. Mathematics
%D 1970
%P 539-582
%V 11
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1970_11_4_a4/
%G en
%F SM_1970_11_4_a4