@article{02236298, title = {Fractional powers of hyponormal operators of Putnam type.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {2005}, year = {2005}, pages = {1925-1932}, doi = {10.1155/IJMMS.2005.1925}, zbl = {1096.47026}, language = {en}, url = {http://dml.mathdoc.fr/item/02236298} }
Diagana, Toka. Fractional powers of hyponormal operators of Putnam type.. International Journal of Mathematics and Mathematical Sciences, Tome 2005 (2005) pp. 1925-1932. doi : 10.1155/IJMMS.2005.1925. http://gdmltest.u-ga.fr/item/02236298/