@article{GDZPPN001184423,
title = {Superconvergence for rectangular mixed finite elements.},
journal = {Numerische Mathematik},
volume = {58},
year = {1990},
pages = {287-298},
zbl = {0691.65076},
url = {http://dml.mathdoc.fr/item/GDZPPN001184423}
}
Durán, Ricardo. Superconvergence for rectangular mixed finite elements.. Numerische Mathematik, Tome 58 (1990) pp. 287-298. http://gdmltest.u-ga.fr/item/GDZPPN001184423/