TY  - JOUR
AU  - L.B. Etigson
TI  - A Cosine Functional Equation with Restricted Argument. (Short Communication).
JO  - Aequationes mathematicae
PY  - 1974
SP  - 118
EP  - 118
VL  - 11
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1974__11_136445/
ID  - AM2_1974__11_136445
ER  -