%0 Journal Article
%A Nikos Frantzikinakis
%T Additive functions
 modulo a countable subgroup of ${\Bbb R}$
%J Colloquium Mathematicum
%D 2003
%P 117-122
%V 95
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/cm95-1-9/
%R 10.4064/cm95-1-9
%G en
%F 10_4064_cm95_1_9