%0 Journal Article
%A V. Ya. Ivrii
%T Wave fronts of solutions of symmetric pseudodifferential systems
%J Doklady Akademii Nauk
%D 1977
%P 1035-1038
%V 233
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1977_233_6_a5/
%G ru
%F DAN_1977_233_6_a5