@article{M2AN_1991__25_5_607_0,
     author = {Stevenson, Rob},
     title = {Discrete {Sobolev} spaces and regularity of elliptic difference schemes},
     journal = {ESAIM: Mathematical Modelling and Numerical Analysis },
     pages = {607--640},
     publisher = {AFCET - Gauthier-Villars},
     address = {Paris},
     volume = {25},
     number = {5},
     year = {1991},
     mrnumber = {1111657},
     zbl = {0733.65058},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/M2AN_1991__25_5_607_0/}
}