TY - JOUR AU - V. V. Dubrovskii TI - Estimation of the difference of spectral functions with brackets JO - Doklady Akademii Nauk PY - 1996 SP - 452 EP - 453 VL - 351 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1996_351_4_a3/ LA - ru ID - DAN_1996_351_4_a3 ER -