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@article{MZ_1984__188_173555, author = {Peng Fan}, title = {Cartesian and {Polar} {Decompositions} of {Hypernormal} {Operators.}}, journal = {Mathematische Zeitschrift}, pages = {485--492}, publisher = {mathdoc}, volume = {188}, year = {1984}, zbl = {0538.47015}, url = {http://geodesic.mathdoc.fr/item/MZ_1984__188_173555/} }
Peng Fan. Cartesian and Polar Decompositions of Hypernormal Operators.. Mathematische Zeitschrift, Tome 188 (1984), pp. 485-492. http://geodesic.mathdoc.fr/item/MZ_1984__188_173555/