%0 Journal Article %A Nakazi, Takahiko %T Absolute Values of Toeplitz Operators and Hankel Operators %J Canadian mathematical bulletin %D 1991 %P 249-253 %V 34 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1991-040-1/ %R 10.4153/CMB-1991-040-1 %F 10_4153_CMB_1991_040_1