@article{MAN_1978__232_163082,
     author = {Domingo A. Herrero},
     title = {Closure of {Similarity} {Orbits} of {Hubert} {Space} {Operators.} {III.}},
     journal = {Mathematische Annalen},
     pages = {195--204},
     publisher = {mathdoc},
     volume = {232},
     year = {1978},
     zbl = {0352.41038},
     url = {http://geodesic.mathdoc.fr/item/MAN_1978__232_163082/}
}