@article{ETNA_2008__29__a2,
     author = {Arioli, M. and Loghin, D.},
     title = {Stopping criteria for mixed finite element problems},
     journal = {Electronic transactions on numerical analysis},
     publisher = {mathdoc},
     volume = {29},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ETNA_2008__29__a2/}
}