%0 Journal Article
%A G. S. Litvinchuk
%T On the index and normal solvability of a class of functional equations
%J Doklady Akademii Nauk
%D 1963
%P 1029-1032
%V 149
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1963_149_5_a6/
%G ru
%F DAN_1963_149_5_a6