@article{1029001261, author = {Fong, Che Kao}, title = {A sufficient condition that an operator be normal.}, journal = {Michigan Math. J.}, volume = {20}, number = {4}, year = {1974}, pages = { 161-162}, language = {en}, url = {http://dml.mathdoc.fr/item/1029001261} }
Fong, Che Kao. A sufficient condition that an operator be normal.. Michigan Math. J., Tome 20 (1974) no. 4, pp. 161-162. http://gdmltest.u-ga.fr/item/1029001261/