TY - JOUR AU - O. L. Safronov TI - The discrete spectrum in gaps of the continuous spectrum for indefinite-sign perturbations with a large coupling constant JO - Algebra i analiz PY - 1996 SP - 162 EP - 194 VL - 8 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/AA_1996_8_2_a9/ LA - ru ID - AA_1996_8_2_a9 ER -