@article{MZ_1967__95_170652,
     author = {Karl-Heinz F\"orster},
     title = {\"Uber lineare, abgeschlossene {Operatoren,} die analytisch von einem {Parameter} abh\"angen.},
     journal = {Mathematische Zeitschrift},
     pages = {251--258},
     publisher = {mathdoc},
     volume = {95},
     year = {1967},
     zbl = {0151.19204},
     url = {http://geodesic.mathdoc.fr/item/MZ_1967__95_170652/}
}