@article{CRMATH_2004__339_10_727_0,
     author = {Lacoste, Patrick},
     title = {La condensation de la matrice masse, ou mass-lumping, pour les \'el\'ements finis mixtes de {Raviart{\textendash}Thomas{\textendash}N\'ed\'elec} d'ordre 1},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {727--732},
     publisher = {Elsevier},
     volume = {339},
     number = {10},
     year = {2004},
     doi = {10.1016/j.crma.2004.09.013},
     language = {fr},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2004.09.013/}
}