@article{CRMATH_2014__352_6_529_0,
     author = {Achchab, Boujem\^aa and Agouzal, Abdellatif and Bouihat, Khalid},
     title = {A simple nonconforming quadrilateral finite element},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {529--533},
     publisher = {Elsevier},
     volume = {352},
     number = {6},
     year = {2014},
     doi = {10.1016/j.crma.2014.03.020},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2014.03.020/}
}