@article{MZ_1974__138_172088,
     author = {Nieberg, Peter Meyer},
     title = {\"Uber {Klassen} schwach kompakter {Operatoren} in {Banachverb\"anden.}},
     journal = {Mathematische Zeitschrift},
     pages = {145--160},
     publisher = {mathdoc},
     volume = {138},
     year = {1974},
     zbl = {0291.47020},
     url = {http://geodesic.mathdoc.fr/item/MZ_1974__138_172088/}
}