TY - JOUR AU - S. D. Troitskaya TI - On the first boundary value problem for a~hyperbolic equation in the plane JO - Matematičeskie zametki PY - 1999 SP - 294 EP - 306 VL - 65 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1999_65_2_a14/ LA - ru ID - MZM_1999_65_2_a14 ER -