%0 Journal Article %A B. N. Khimchenko %T The boundedness in a closed region of the gradient of a harmonic funcion %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1970 %V 25 %N 2 %U http://geodesic.mathdoc.fr/item/RM_1970_25_2_a16/ %G ru %F RM_1970_25_2_a16