TY - JOUR AU - Tosio Kato TI - Smooth operators and commutators JO - Studia Mathematica PY - 1968 SP - 535 EP - 546 VL - 31 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/sm-31-5-535-546/ DO - 10.4064/sm-31-5-535-546 LA - en ID - 10_4064_sm_31_5_535_546 ER -