@article{GDZPPN001183303, title = {Algebraic Multi Level Preconditioning Methods. I.}, journal = {Numerische Mathematik}, volume = {56}, year = {1989}, pages = {157-178}, zbl = {0661.65110}, url = {http://dml.mathdoc.fr/item/GDZPPN001183303} }
Axelsson, O.; Vassilevski, P.S. Algebraic Multi Level Preconditioning Methods. I.. Numerische Mathematik, Tome 56 (1989) pp. 157-178. http://gdmltest.u-ga.fr/item/GDZPPN001183303/