@article{MAN_1967__174_161644,
     author = {J.W. Baker},
     title = {Operators with {Closed} {Range.}},
     journal = {Mathematische Annalen},
     pages = {278--284},
     year = {1967},
     volume = {174},
     zbl = {0155.46003},
     url = {http://geodesic.mathdoc.fr/item/MAN_1967__174_161644/}
}