@article{GDZPPN001179306, title = {A Three-Dimensional Quadratic Nonconforming Element.}, journal = {Numerische Mathematik}, volume = {46}, year = {1985}, pages = {269-280}, zbl = {0577.65008}, url = {http://dml.mathdoc.fr/item/GDZPPN001179306} }
Fortin, M. A Three-Dimensional Quadratic Nonconforming Element.. Numerische Mathematik, Tome 46 (1985) pp. 269-280. http://gdmltest.u-ga.fr/item/GDZPPN001179306/