@article{GDZPPN001183869, title = {A Multi-Grid Algorithm for Mixed Problems with Penalty.}, journal = {Numerische Mathematik}, volume = {58}, year = {1990}, pages = {227-248}, zbl = {0712.73106}, url = {http://dml.mathdoc.fr/item/GDZPPN001183869} }
Huang, Ziping. A Multi-Grid Algorithm for Mixed Problems with Penalty.. Numerische Mathematik, Tome 58 (1990) pp. 227-248. http://gdmltest.u-ga.fr/item/GDZPPN001183869/