%0 Journal Article %A M. B. Kapilevich %T Mixed boundary value problems for singular hyperbolic equations %J Doklady Akademii Nauk %D 1960 %P 1005-1008 %V 132 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1960_132_5_a8/ %G ru %F DAN_1960_132_5_a8