TY  - JOUR
AU  - Chun-San Lee
AU  - Sen-Yen Shaw
TI  - Representation formulas for cosine and sine functions of operators.
JO  - Aequationes mathematicae
PY  - 1985
SP  - 162
EP  - 171
VL  - 29
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1985__29_137090/
ID  - AM2_1985__29_137090
ER  -