@article{LJM_2003_13_a7,
     author = {E. Laitinen and A. V. Lapin and J. Piesk\"a},
     title = {Numerical experiments with multilevel {Subdomain} decomposition method},
     journal = {Lobachevskii journal of mathematics},
     pages = {67--80},
     year = {2003},
     volume = {13},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/LJM_2003_13_a7/}
}