@article{NUMA_1968__12_131889,
     author = {H. NOLTEMEIER and M. OST},
     title = {Zum {Auswahlproblem.}},
     journal = {Numerische Mathematik},
     pages = {431--434},
     publisher = {mathdoc},
     volume = {12},
     year = {1968},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1968__12_131889/}
}