%0 Journal Article
%A Yu. V. Egorov
%T Propagation of singularities for solutions of an equation of principal type
%J Sbornik. Mathematics
%D 1983
%P 527-538
%V 46
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1983_46_4_a5/
%G en
%F SM_1983_46_4_a5