TY - JOUR AU - S. V. Pereverzev TI - Approximation numbers and the eigenvalue problem for integral operators JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 1987 SP - 175 EP - 176 VL - 180 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TM_1987_180_a104/ LA - ru ID - TM_1987_180_a104 ER -