@article{GDZPPN001184288,
title = {On block diagonal and Schur complement preconditioning.},
journal = {Numerische Mathematik},
volume = {58},
year = {1990},
pages = {79-94},
zbl = {0687.65036},
url = {http://dml.mathdoc.fr/item/GDZPPN001184288}
}
Mandel, Jan. On block diagonal and Schur complement preconditioning.. Numerische Mathematik, Tome 58 (1990) pp. 79-94. http://gdmltest.u-ga.fr/item/GDZPPN001184288/