@article{NUMA_1992__63_1_133676,
     author = {Richard E. Ewing and JunPing Wang},
     title = {Analysis of mixed finite element methods on locally refined grids.},
     journal = {Numerische Mathematik},
     pages = {183--194},
     publisher = {mathdoc},
     volume = {63},
     number = {1},
     year = {1992},
     zbl = {0772.65071},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1992__63_1_133676/}
}