TY - JOUR AU - I. M. Spitkovsky TI - On block operators and related questions in the theory of factorization of matrix-valued functions JO - Doklady Akademii Nauk PY - 1980 SP - 816 EP - 820 VL - 254 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1980_254_4_a11/ LA - ru ID - DAN_1980_254_4_a11 ER -