TY - JOUR AU - A. S. Starkov TI - Degeneration and resonance phenomena in the wave propagation problems JO - Zapiski Nauchnykh Seminarov POMI PY - 1981 SP - 217 EP - 227 VL - 104 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ZNSL_1981_104_a19/ LA - ru ID - ZNSL_1981_104_a19 ER -