TY  - JOUR
AU  - Czeslaw Dyjak
TI  - On A Characterization Of Trigonometrical And Hyperbolic Functions By Functional Equations
JO  - Publications de l'Institut Mathématique
PY  - 1982
SP  - 45 
VL  - _N_S_32
IS  - 46
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/PIM_1982_N_S_32_46_a7/
ID  - PIM_1982_N_S_32_46_a7
ER  -