%0 Journal Article %A Tosio Kato %T Smooth operators and commutators %J Studia Mathematica %D 1968 %P 535-546 %V 31 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-31-5-535-546/ %R 10.4064/sm-31-5-535-546 %G en %F 10_4064_sm_31_5_535_546