@article{NUMA_1993__66_3_133768,
     author = {Rob Stevenson},
     title = {Robustness of multi-grid applied to anisotropic equations on convex domains with re-entrant corners.},
     journal = {Numerische Mathematik},
     pages = {373--398},
     publisher = {mathdoc},
     volume = {66},
     number = {3},
     year = {1993},
     zbl = {0791.65090},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1993__66_3_133768/}
}