%0 Journal Article
%A V. Ya. Ivrii
%T Conditions that the Cauchy problem for hyperbolic operators with characteristics of variable multiplicity be well posed in Gevrey classes
%J Doklady Akademii Nauk
%D 1975
%P 1253-1255
%V 221
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1975_221_6_a1/
%G ru
%F DAN_1975_221_6_a1