%0 Journal Article
%A Nishitani, Tatsuo
%T On The Cauchy Problem for Non Effectively Hyperbolic Operators, The Ivrii-Petkov-Hörmander Condition and the Gevrey Well Posedness
%J Serdica Mathematical Journal
%D 2008
%P 155-178
%V 34
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SMJ2_2008_34_1_a6/
%G en
%F SMJ2_2008_34_1_a6