TY - JOUR AU - V. M. Babich TI - A~point source of oscillation in a~neighbourhood of a~concave mirror.~II JO - Zapiski Nauchnykh Seminarov POMI PY - 1979 SP - 3 EP - 13 VL - 89 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ZNSL_1979_89_a0/ LA - ru ID - ZNSL_1979_89_a0 ER -