@article{CMH_1938__11_138729,
     author = {H. Hadwiger},
     title = {\"Uber die mittlere mittlere {Breite} zufallsartig gestalteter {Polygone.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {321--329},
     publisher = {mathdoc},
     volume = {11},
     year = {1938},
     zbl = {65.0835.02},
     url = {http://geodesic.mathdoc.fr/item/CMH_1938__11_138729/}
}