@article{CM_1938__5__347_0,
     author = {Hopf, Heinz},
     title = {Eine {Charakterisierung} der {Bettischen} {Gruppen} von {Polyedern} durch stetige {Abbildungen}},
     journal = {Compositio Mathematica},
     pages = {347--353},
     publisher = {Johnson Reprint Corporation},
     volume = {5},
     year = {1938},
     zbl = {0018.42604},
     language = {de},
     url = {http://archive.numdam.org/item/CM_1938__5__347_0/}
}