%0 Journal Article
%A V. Ya. Ivrii
%T The Cauchy problem for nonstrictly hyperbolic equations with smooth roots
%J Doklady Akademii Nauk
%D 1972
%P 1303-1304
%V 204
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1972_204_6_a5/
%G ru
%F DAN_1972_204_6_a5