@article{MZ_1972__127_171767,
     author = {Eberhard Schock},
     title = {\"Uber die {Konvergenzgeschwindigkeit} projektiver {Verfahren.} {II.}},
     journal = {Mathematische Zeitschrift},
     pages = {191--198},
     publisher = {mathdoc},
     volume = {127},
     year = {1972},
     zbl = {0226.47009},
     url = {http://geodesic.mathdoc.fr/item/MZ_1972__127_171767/}
}