TY  - JOUR
AU  - S. K. Kumykova
TI  - A boundary value problem for a degenerate hyperbolic equation in a characteristic crescent
JO  - Differencialʹnye uravneniâ
PY  - 1979
SP  - 79
EP  - 91
VL  - 15
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1979_15_1_a10/
LA  - ru
ID  - DE_1979_15_1_a10
ER  -