%0 Journal Article %A A. V. Bitsadze %T A special case of the problem of the oblique derivative for harmonic functions in three-dimensional domains %J Doklady Akademii Nauk %D 1964 %P 730-731 %V 155 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1964_155_4_a1/ %G ru %F DAN_1964_155_4_a1