%0 Journal Article
%A Haruki, Hiroshi
%T On the Functional Equations f(x+iy)| = |f(x)+f(iy)| and |f(x+iy)| = |f(x)-f(iy)| and on Ivory's Theorem
%J Canadian mathematical bulletin
%D 1966
%P 473-480
%V 9
%N 4
%U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1966-058-x/
%R 10.4153/CMB-1966-058-x
%F 10_4153_CMB_1966_058_x