@article{MZ_1950__53_169182,
     author = {H. Hadwiger},
     title = {Minkowskische {Addition} und {Subtraktion} beliebiger {Punkt-mengen} und die {Theoreme} von {Erhard} {Schmidt}},
     journal = {Mathematische Zeitschrift},
     pages = {210--218},
     publisher = {mathdoc},
     volume = {53},
     year = {1950},
     zbl = {0040.38301},
     url = {http://geodesic.mathdoc.fr/item/MZ_1950__53_169182/}
}