@article{MZ_1954__61_169461,
     author = {Detlef Laugwitz},
     title = {Konvexe {Mittelpunktsbereiche} und normierte {R\"aume.}},
     journal = {Mathematische Zeitschrift},
     pages = {235--244},
     publisher = {mathdoc},
     volume = {61},
     year = {1954},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MZ_1954__61_169461/}
}