@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/