%0 Journal Article %A V. G. Maz'ya %T On the modulus of continuity of a harmonic function at a boundary point %J Zapiski Nauchnykh Seminarov POMI %D 1984 %P 87-95 %V 135 %U http://geodesic.mathdoc.fr/item/ZNSL_1984_135_a7/ %G ru %F ZNSL_1984_135_a7