TY - JOUR AU - N. K. Nikol'skii TI - Invariant subspaces of the shift operator and weakly invertible elements in $L^\infty$ JO - Doklady Akademii Nauk PY - 1966 SP - 985 EP - 988 VL - 167 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1966_167_5_a5/ LA - ru ID - DAN_1966_167_5_a5 ER -