%0 Journal Article
%A V. V. Grushin
%A N. A. Shananin
%T Some theorems on the singularities of solutions of differential equations with weighted principal symbols
%J Sbornik. Mathematics
%D 1977
%P 32-44
%V 32
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1977_32_1_a2/
%G en
%F SM_1977_32_1_a2