@article{1077310584, author = {Wadhwa, Bhushan L.}, title = {$M$ -hyponormal operators}, journal = {Duke Math. J.}, volume = {41}, number = {1}, year = {1974}, pages = { 655-660}, language = {en}, url = {http://dml.mathdoc.fr/item/1077310584} }
Wadhwa, Bhushan L. $M$ -hyponormal operators. Duke Math. J., Tome 41 (1974) no. 1, pp. 655-660. http://gdmltest.u-ga.fr/item/1077310584/