@article{10_4153_CMB_1974_032_7,
     author = {Vasilescu, F.-H.},
     title = {The {Range} {Sequence} of an {Operator}},
     journal = {Canadian mathematical bulletin},
     pages = {145--147},
     year = {1974},
     volume = {17},
     number = {1},
     doi = {10.4153/CMB-1974-032-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1974-032-7/}
}