@article{01139478,
title = {Regularity up to the boundary of solutions of the Dirichlet problem for certain degenerate elliptic equations.},
journal = {Portugaliae Mathematica. Nova S\'erie},
volume = {55},
year = {1998},
pages = {25-37},
zbl = {0896.35025},
language = {en},
url = {http://dml.mathdoc.fr/item/01139478}
}
Petronilho, G. Regularity up to the boundary of solutions of the Dirichlet problem for certain degenerate elliptic equations.. Portugaliae Mathematica. Nova Série, Tome 55 (1998) pp. 25-37. http://gdmltest.u-ga.fr/item/01139478/