@article{CMH_1955__29_139101,
     author = {E. Stiefel},
     title = {Relaxationsmethoden bester {Strategie} zur {L\"osung} linearer {Gleichungssysteme.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {157--179},
     publisher = {mathdoc},
     volume = {29},
     year = {1955},
     zbl = {0066.36703},
     url = {http://geodesic.mathdoc.fr/item/CMH_1955__29_139101/}
}