TY  - JOUR
AU  - Haruki, Hiroshi
TI  - On the Functional Equations f(x+iy)| = |f(x)+f(iy)| and |f(x+iy)| = |f(x)-f(iy)| and on Ivory's Theorem
JO  - Canadian mathematical bulletin
PY  - 1966
SP  - 473
EP  - 480
VL  - 9
IS  - 4
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1966-058-x/
DO  - 10.4153/CMB-1966-058-x
ID  - 10_4153_CMB_1966_058_x
ER  -