@article{CMH_1942__15_138802,
     author = {E. Preisig},
     title = {\"Uber {Bewegungsmittelwerte} konvexer {K\"orper} in {Gittern.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {120--143},
     year = {1942},
     volume = {15},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/CMH_1942__15_138802/}
}