@article{M2AN_2004__38_5_765_0,
     author = {Sala, Marzio},
     title = {Analysis of two-level domain decomposition preconditioners based on aggregation},
     journal = {ESAIM: Mathematical Modelling and Numerical Analysis },
     pages = {765--780},
     publisher = {EDP-Sciences},
     volume = {38},
     number = {5},
     year = {2004},
     doi = {10.1051/m2an:2004038},
     mrnumber = {2104428},
     zbl = {1078.65120},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1051/m2an:2004038/}
}