@article{MM2_1994__84_1_155977,
     author = {G. Di Fazio},
     title = {Dirichlet problem. {Characterization} of regularity.},
     journal = {Manuscripta mathematica},
     pages = {47--56},
     publisher = {mathdoc},
     volume = {84},
     number = {1},
     year = {1994},
     zbl = {0816.35009},
     url = {http://geodesic.mathdoc.fr/item/MM2_1994__84_1_155977/}
}