TY  - JOUR
AU  - JEROME A. GOLDSTEIN
TI  - On the Convergence and Approximation of Cosine Functions (Short Communication)
JO  - Aequationes mathematicae
PY  - 1973
SP  - 309
EP  - 309
VL  - 9
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1973__9_136373/
ID  - AM2_1973__9_136373
ER  -