TY - JOUR AU - S. K. Kumykova TI - A problem with nonlocal conditions on characteristics for a hyperbolic equation that degenerates inside the domain JO - Differencialʹnye uravneniâ PY - 1981 SP - 81 EP - 90 VL - 17 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1981_17_1_a10/ LA - ru ID - DE_1981_17_1_a10 ER -