TY - JOUR AU - V. I. Chekhlov TI - A mixed problem with a discontinuous boundary operator for a hyperbolic equation JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1973 SP - 171 EP - 223 VL - 126 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TM_1973_126_a5/ LA - ru ID - TM_1973_126_a5 ER -