@article{JRAM_1913__143_149403,
     author = {Ernst Steinitz},
     title = {Bedingt konvergente {Reihen} und konvexe {Systeme.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {128--176},
     publisher = {mathdoc},
     volume = {143},
     year = {1913},
     zbl = {44.0287.01},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1913__143_149403/}
}