@article{GDZPPN002430266, title = {Cartesian and Polar Decompositions of Hypernormal Operators.}, journal = {Mathematische Zeitschrift}, volume = {185}, year = {1984}, pages = {485-492}, zbl = {0538.47015}, url = {http://dml.mathdoc.fr/item/GDZPPN002430266} }
Fan, Peng. Cartesian and Polar Decompositions of Hypernormal Operators.. Mathematische Zeitschrift, Tome 185 (1984) pp. 485-492. http://gdmltest.u-ga.fr/item/GDZPPN002430266/