@article{ETNA_2006__22__a8,
     author = {Hanisch,  M.R.},
     title = {Two-level additive {Schwarz} preconditioners for fourth-order mixed methods},
     journal = {Electronic transactions on numerical analysis},
     pages = {1--16},
     year = {2006},
     volume = {22},
     zbl = {1115.65328},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ETNA_2006__22__a8/}
}