%0 Journal Article %A B. Z. Royhel %T On an inverse problem for an equation of hyperbolic type %J Differencialʹnye uravneniâ %D 1990 %P 1462-1464 %V 26 %N 8 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1990_26_8_a26/ %G ru %F DE_1990_26_8_a26