%0 Journal Article
%A G. A. Kolupanova
%T On a differential equation of hyperbolic type in Banach space
%J Doklady Akademii Nauk
%D 1972
%P 1044-1047
%V 207
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1972_207_5_a6/
%G ru
%F DAN_1972_207_5_a6