@article{MZ_1927__26_167960,
     author = {H. Hopf},
     title = {\"Uber {Mindestzahlen} von {Fixpunkten}},
     journal = {Mathematische Zeitschrift},
     pages = {762--774},
     publisher = {mathdoc},
     volume = {26},
     year = {1927},
     zbl = {53.0554.01},
     url = {http://geodesic.mathdoc.fr/item/MZ_1927__26_167960/}
}