%0 Journal Article
%A A. V. Bitsadze
%T The homogeneous problem for the directional derivative for harmonic functions in three-dimensional regions
%J Doklady Akademii Nauk
%D 1963
%P 749-752
%V 148
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1963_148_4_a2/
%G ru
%F DAN_1963_148_4_a2