@article{03843103, title = {On mixed finite element techniques for elliptic problems.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {6}, year = {1983}, pages = {755-766}, doi = {10.1155/S0161171283000642}, zbl = {0531.65055}, language = {en}, url = {http://dml.mathdoc.fr/item/03843103} }
Noor, M.Aslam. On mixed finite element techniques for elliptic problems.. International Journal of Mathematics and Mathematical Sciences, Tome 6 (1983) pp. 755-766. doi : 10.1155/S0161171283000642. http://gdmltest.u-ga.fr/item/03843103/