@article{GDZPPN001170112, title = {Zweiparametrige \"Uberrelaxation.}, journal = {Numerische Mathematik}, volume = {18}, year = {1971}, pages = {354-366}, url = {http://dml.mathdoc.fr/item/GDZPPN001170112} }
Hübner, O. Zweiparametrige Überrelaxation.. Numerische Mathematik, Tome 18 (1971) pp. 354-366. http://gdmltest.u-ga.fr/item/GDZPPN001170112/