%0 Journal Article
%A L.B. Etigson
%T A Cosine Functional Equation with Restricted Argument. (Short Communication).
%J Aequationes mathematicae
%D 1974
%P 118-118
%V 11
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AM2_1974__11_136445/
%F AM2_1974__11_136445