TY - JOUR AU - D. van Dulst TI - Perturbation theory and strictly singular operators in locally convex spaces JO - Studia Mathematica PY - 1970 SP - 341 EP - 372 VL - 38 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/sm-38-1-341-372/ DO - 10.4064/sm-38-1-341-372 LA - en ID - 10_4064_sm_38_1_341_372 ER -