@article{GDZPPN002327279, title = {Hyponormal Operators and Dunford's Condition (B).}, journal = {Mathematische Annalen}, volume = {270}, year = {1985}, pages = {567-576}, zbl = {0555.47018}, url = {http://dml.mathdoc.fr/item/GDZPPN002327279} }
Radjabalipour, Mehdi. Hyponormal Operators and Dunford's Condition (B).. Mathematische Annalen, Tome 270 (1985) pp. 567-576. http://gdmltest.u-ga.fr/item/GDZPPN002327279/