TY  - JOUR
AU  - Haruki, Hiroshi
TI  - On Two Functional Equations for the Trigonometric Functions
JO  - Canadian mathematical bulletin
PY  - 1969
SP  - 281
EP  - 286
VL  - 12
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1969-035-1/
DO  - 10.4153/CMB-1969-035-1
ID  - 10_4153_CMB_1969_035_1
ER  -