@article{GDZPPN001179667,
title = {Two Families of Mixed Finite Elements for Second Order Elliptic Problems.},
journal = {Numerische Mathematik},
volume = {46},
year = {1985},
pages = {217-236},
zbl = {0599.65072},
url = {http://dml.mathdoc.fr/item/GDZPPN001179667}
}
Brezzi, F.; Douglas, J., Jr.; Marini, L.D. Two Families of Mixed Finite Elements for Second Order Elliptic Problems.. Numerische Mathematik, Tome 46 (1985) pp. 217-236. http://gdmltest.u-ga.fr/item/GDZPPN001179667/