@article{CMH_1969__44_139420,
     author = {Guerino Mazzola},
     title = {Finslersche {Zahlen.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {495--501},
     year = {1969},
     volume = {44},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/CMH_1969__44_139420/}
}