TY - JOUR AU - V. V. Zalipaev TI - Plane wave diffraction by a step discontinuity in an impedamce plane JO - Zapiski Nauchnykh Seminarov POMI PY - 1998 SP - 97 EP - 108 VL - 250 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ZNSL_1998_250_a7/ LA - ru ID - ZNSL_1998_250_a7 ER -