@article{MAN_1977__229_163009,
     author = {Klaus Langmann},
     title = {Zum {Satz} von {Frisch.}},
     journal = {Mathematische Annalen},
     pages = {141--142},
     publisher = {mathdoc},
     volume = {229},
     year = {1977},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MAN_1977__229_163009/}
}