%0 Journal Article
%A F. E. Lomovtsev
%T Second-order hyperbolic differential equations with discontinuous operator coefficients
%J Differencialʹnye uravneniâ
%D 1997
%P 1394-1403
%V 33
%N 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1997_33_10_a12/
%G ru
%F DE_1997_33_10_a12