%0 Journal Article
%A Etigson, L. B.
%T A Cosine Functional Equation with Restricted Argument
%J Canadian mathematical bulletin
%D 1974
%P 505-509
%V 17
%N 4
%U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1974-089-x/
%R 10.4153/CMB-1974-089-x
%F 10_4153_CMB_1974_089_x