%0 Journal Article
%A V. A. Vassiliev
%T Sharpness and the local Petrovskii condition for strictly hyperbolic operators with constant coefficients
%J Izvestiya. Mathematics 
%D 1987
%P 233-273
%V 28
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM2_1987_28_2_a1/
%G en
%F IM2_1987_28_2_a1