@article{CMH_1956__30_139130,
     author = {D. Ohmann},
     title = {Ungleichungen f\"ur die {Minkowskische} {Summe} und {Differenz} konkaver {K\"orper.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {297--304},
     publisher = {mathdoc},
     volume = {30},
     year = {1956},
     zbl = {0074.17701},
     url = {http://geodesic.mathdoc.fr/item/CMH_1956__30_139130/}
}