TY - JOUR AU - G. K. Langer TI - Invariant subspaces of linear operators acting in a space with indefinite metric JO - Doklady Akademii Nauk PY - 1966 SP - 12 EP - 15 VL - 169 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1966_169_1_a1/ LA - ru ID - DAN_1966_169_1_a1 ER -