@article{10_4153_CMB_1991_040_1,
     author = {Nakazi, Takahiko},
     title = {Absolute {Values} of {Toeplitz} {Operators} and {Hankel} {Operators}},
     journal = {Canadian mathematical bulletin},
     pages = {249--253},
     year = {1991},
     volume = {34},
     number = {2},
     doi = {10.4153/CMB-1991-040-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1991-040-1/}
}