@article{GDZPPN00118377X, title = {Preconditionings and Splittings for Rectangular Systems.}, journal = {Numerische Mathematik}, volume = {58}, year = {1990}, pages = {85-96}, zbl = {0704.65018}, url = {http://dml.mathdoc.fr/item/GDZPPN00118377X} }
Neumann, Michael; Hanke, Martin. Preconditionings and Splittings for Rectangular Systems.. Numerische Mathematik, Tome 58 (1990) pp. 85-96. http://gdmltest.u-ga.fr/item/GDZPPN00118377X/