%0 Journal Article
%A D. G. Orlovskii
%T An inverse problem for an equation of hyperbolic type in a Hilbert space
%J Differencialʹnye uravneniâ
%D 1991
%P 1771-1778
%V 27
%N 10
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1991_27_10_a14/
%G ru
%F DE_1991_27_10_a14