@article{ZNSL_1984_135_a7,
     author = {V. G. Maz'ya},
     title = {On the modulus of continuity of a~harmonic function at a~boundary point},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {87--95},
     year = {1984},
     volume = {135},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1984_135_a7/}
}