TY - JOUR AU - F. T. Baranovskii TI - The Goursat problem for a second order hyperbolic equation with a singularity in the coefficient JO - Differencialʹnye uravneniâ PY - 1977 SP - 2234 EP - 2245 VL - 13 IS - 12 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1977_13_12_a13/ LA - ru ID - DE_1977_13_12_a13 ER -