TY  - JOUR
AU  - Ralf Kern
TI  - Mulitply Periodic Real Functions and Their Period Sets.
JO  - Manuscripta mathematica
PY  - 1977
SP  - 153
EP  - 176
VL  - 20
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MM2_1977__20_154434/
ID  - MM2_1977__20_154434
ER  -