@article{M2AN_1999__33_3_459_0,
     author = {Achchab, Boujem\^aa and Agouzal, Abdellatif},
     title = {Formulations mixtes augment\'ees et applications},
     journal = {ESAIM: Mod\'elisation math\'ematique et analyse num\'erique},
     pages = {459--478},
     publisher = {EDP-Sciences},
     volume = {33},
     number = {3},
     year = {1999},
     mrnumber = {1713233},
     zbl = {0943.65128},
     language = {fr},
     url = {http://archive.numdam.org/item/M2AN_1999__33_3_459_0/}
}