%0 Journal Article
%A Yu. B. Orochko
%T Finite local propagation rate of a~hyperbolic equation in the problem of selfadjointness of powers of a~second order elliptic differential operator
%J Izvestiya. Mathematics 
%D 1984
%P 277-290
%V 22
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM2_1984_22_2_a4/
%G en
%F IM2_1984_22_2_a4