@article{1256049502, author = {Radjabalipour, M.}, title = {Ranges of hyponormal operators}, journal = {Illinois J. Math.}, volume = {21}, number = {4}, year = {1977}, pages = { 70-75}, language = {en}, url = {http://dml.mathdoc.fr/item/1256049502} }
Radjabalipour, M. Ranges of hyponormal operators. Illinois J. Math., Tome 21 (1977) no. 4, pp. 70-75. http://gdmltest.u-ga.fr/item/1256049502/