@article{CMH_1973__48_139546,
     author = {J.M. Wills},
     title = {\"Uber konvexe {Gitterpolygone}},
     journal = {Commentarii mathematici Helvetici},
     pages = {188--194},
     publisher = {mathdoc},
     volume = {48},
     year = {1973},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/CMH_1973__48_139546/}
}