TY  - JOUR
AU  - A.B. Buche
TI  - On an Exponential-Cosine Operator-Valued Functional Equation. (Short Communication).
JO  - Aequationes mathematicae
PY  - 1975
SP  - 117
EP  - 117
VL  - 12
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1975__12_136498/
ID  - AM2_1975__12_136498
ER  -