TY - JOUR AU - V. L. Azarov AU - L. N. Lupichev AU - G. A. Tavrizov TI - A theorem in the perturbation theory of linear operators and its applications in the theory of linear dynamic systems JO - Doklady Akademii Nauk PY - 1975 SP - 56 EP - 59 VL - 223 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1975_223_1_a13/ LA - ru ID - DAN_1975_223_1_a13 ER -