%0 Journal Article
%A Ralf Kern
%T Mulitply Periodic Real Functions and Their Period Sets.
%J Manuscripta mathematica
%D 1977
%P 153-176
%V 20
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MM2_1977__20_154434/
%F MM2_1977__20_154434