@article{MZ_1977__155_172557,
     author = {Leon Simon},
     title = {On a {Theorem} of de {Giorgi} and {Stampacchia.}},
     journal = {Mathematische Zeitschrift},
     pages = {199--204},
     publisher = {mathdoc},
     volume = {155},
     year = {1977},
     zbl = {0385.49022},
     url = {http://geodesic.mathdoc.fr/item/MZ_1977__155_172557/}
}