@article{NUMA_1985__46_132996,
     author = {M. Fortin},
     title = {A {Three-Dimensional} {Quadratic} {Nonconforming} {Element.}},
     journal = {Numerische Mathematik},
     pages = {269--280},
     year = {1985},
     volume = {46},
     zbl = {0577.65008},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1985__46_132996/}
}