%0 Journal Article %A Che-Kao Fong %T On M-hyponormal operators %J Studia Mathematica %D 1979 %P 1-5 %V 65 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-65-1-1-5/ %R 10.4064/sm-65-1-1-5 %G en %F 10_4064_sm_65_1_1_5