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@article{NUMA_1989__56_2-3_133390, author = {O. Axelsson and P.S. Vassilevski}, title = {Algebraic {Multi} {Level} {Preconditioning} {Methods.} {I.}}, journal = {Numerische Mathematik}, pages = {157--178}, publisher = {mathdoc}, volume = {56}, number = {2-3}, year = {1989}, zbl = {0661.65110}, url = {http://geodesic.mathdoc.fr/item/NUMA_1989__56_2-3_133390/} }
O. Axelsson; P.S. Vassilevski. Algebraic Multi Level Preconditioning Methods. I.. Numerische Mathematik, Tome 56 (1989) no. 2-3, pp. 157-178. http://geodesic.mathdoc.fr/item/NUMA_1989__56_2-3_133390/