TY - JOUR AU - V. M. Babich TI - Mathematical theory of diffraction (a~survey of research carried out at the Laboratory of Mathematical Problems of Geophysics of the Leningrad Branch of the Institute of Mathematics) JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1986 SP - 47 EP - 62 VL - 175 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TM_1986_175_a2/ LA - ru ID - TM_1986_175_a2 ER -