@article{CMH_1929__1_138526,
     author = {Anna Fischer},
     title = {Zentrale {Verkettungen.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {313--323},
     publisher = {mathdoc},
     volume = {1},
     year = {1929},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/CMH_1929__1_138526/}
}