@article{MAN_1928__98_159207,
     author = {H. Cremer},
     title = {Zum {Zentrumproblem}},
     journal = {Mathematische Annalen},
     pages = {151--163},
     publisher = {mathdoc},
     volume = {98},
     year = {1928},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MAN_1928__98_159207/}
}