%0 Journal Article
%A A. I. Vol'pert
%T The index of boundary value problems for systems of harmonic functions in three independent variables
%J Doklady Akademii Nauk
%D 1960
%P 13-15
%V 133
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1960_133_1_a1/
%G ru
%F DAN_1960_133_1_a1