@article{JRAM_1976__280_151671,
     author = {H. Hadwiger and J.M. Wills},
     title = {Neuere {Studien} \"uber {Gitterpolygone.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {61--69},
     publisher = {mathdoc},
     volume = {280},
     year = {1976},
     zbl = {0321.52004},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1976__280_151671/}
}