@article{MAN_1965__162_161327,
     author = {G. NEUBAUER},
     title = {\"Uber den {Index} abgeschlossener {Operatoren} in {Banachr\"aumen.} {II.}},
     journal = {Mathematische Annalen},
     pages = {92--119},
     year = {1965},
     volume = {162},
     zbl = {0149.10102},
     url = {http://geodesic.mathdoc.fr/item/MAN_1965__162_161327/}
}