@article{NUMA_1960__2_131439,
     author = {E. STIEFEL},
     title = {Note on {Jordan} elimination, linear programming and {Tschebyscheff} approximation.},
     journal = {Numerische Mathematik},
     pages = {1--17},
     year = {1960},
     volume = {2},
     zbl = {0097.32306},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1960__2_131439/}
}