@article{1102905369, author = {Vasilescu, F.-H.}, title = {The closed range modulus of operators.}, journal = {Pacific J. Math.}, volume = {61}, number = {2}, year = {1975}, pages = { 599-610}, language = {en}, url = {http://dml.mathdoc.fr/item/1102905369} }
Vasilescu, F.-H. The closed range modulus of operators.. Pacific J. Math., Tome 61 (1975) no. 2, pp. 599-610. http://gdmltest.u-ga.fr/item/1102905369/