%0 Journal Article %A L. E. Vostrova %T Boundary value problems for a wave equation in noncharacteristic domains %J Differencialʹnye uravneniâ %D 1979 %P 2266-2268 %V 15 %N 12 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1979_15_12_a18/ %G ru %F DE_1979_15_12_a18