@article{ETNA_2006__23__a16,
     author = {Nicaise, Serge and Creus\'e, Emmanuel},
     title = {Isotropic and anisotropic a posteriori error estimation of the mixed finite element method for second order operators in divergence form},
     journal = {Electronic transactions on numerical analysis},
     pages = {38--62},
     publisher = {mathdoc},
     volume = {23},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ETNA_2006__23__a16/}
}