@article{M2AN_1993__27_1_9_0,
     author = {Chen, Zhangxin},
     title = {Analysis of mixed methods using conforming and nonconforming finite element methods},
     journal = {ESAIM: Mathematical Modelling and Numerical Analysis },
     pages = {9--34},
     publisher = {AFCET - Gauthier-Villars},
     address = {Paris},
     volume = {27},
     number = {1},
     year = {1993},
     mrnumber = {1204626},
     zbl = {0784.65075},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/M2AN_1993__27_1_9_0/}
}