%0 Journal Article
%A H. Haruki
%T A new Pythagorean functional equation.
%J Aequationes mathematicae
%D 1990
%P 271-280
%V 40
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AM2_1990__40_1_137378/
%F AM2_1990__40_1_137378