%0 Journal Article %A T. Eldesbaev %T Certain inverse problems for degenerate hyperbolic equations %J Differencialʹnye uravneniâ %D 1976 %P 502-510 %V 12 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1976_12_3_a10/ %G ru %F DE_1976_12_3_a10