@article{MZ_1985__190_173637,
     author = {Rainer Wittmann},
     title = {Positive {Harmonic} {Functions} on {Nontangentially} {Accessible} {Domains.}},
     journal = {Mathematische Zeitschrift},
     pages = {419--438},
     publisher = {mathdoc},
     volume = {190},
     year = {1985},
     zbl = {0555.31006},
     url = {http://geodesic.mathdoc.fr/item/MZ_1985__190_173637/}
}