%0 Journal Article %A S. M. Manukyan %T Solution of a boundary value problem for an equation of mixed type in the presence of a discontinuity surface %J Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki %D 1980 %P 948-964 %V 20 %N 4 %U http://geodesic.mathdoc.fr/item/ZVMMF_1980_20_4_a12/ %G ru %F ZVMMF_1980_20_4_a12