@article{JRAM_1956__196_150322,
     author = {Erich H\"artter},
     title = {Ein {Beitrag} zur {Theorie} der {Minimalbasen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {170--204},
     publisher = {mathdoc},
     volume = {196},
     year = {1956},
     zbl = {0074.27305},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1956__196_150322/}
}