@article{CMH_1953__27_139060,
     author = {D. Ohmann},
     title = {Ein vollst\"andiges {Ungleichungssystem} f\"ur {Minkowskische} {Summe} und {Differenz.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {151--156},
     publisher = {mathdoc},
     volume = {27},
     year = {1953},
     zbl = {0050.38803},
     url = {http://geodesic.mathdoc.fr/item/CMH_1953__27_139060/}
}