@article{NUMA_1991__60_4_133593,
     author = {R. Verf\"urth},
     title = {A posteriori error estimators for the {Stokes} equations {II} non-conforming discretizations.},
     journal = {Numerische Mathematik},
     pages = {235--250},
     publisher = {mathdoc},
     volume = {60},
     number = {4},
     year = {1991},
     zbl = {0739.76035},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1991__60_4_133593/}
}