@article{MZ_1957__67_169656,
     author = {Konrad Jacobs},
     title = {Fastperiodizit\"atseigenschaften allgemeiner {Halbgruppen} in {Banach-R\"aumen.}},
     journal = {Mathematische Zeitschrift},
     pages = {83--92},
     publisher = {mathdoc},
     volume = {67},
     year = {1957},
     zbl = {0077.10901},
     url = {http://geodesic.mathdoc.fr/item/MZ_1957__67_169656/}
}