TY - JOUR AU - S. I. Yakovlev TI - A~finiteness bound for the singular spectrum in a~neighborhood of a~singular point of operators of the Friedrichs model JO - Algebra i analiz PY - 1998 SP - 210 EP - 237 VL - 10 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/AA_1998_10_4_a8/ LA - ru ID - AA_1998_10_4_a8 ER -