%0 Journal Article
%T On groups and normal polymorphic functions
%J Revista colombiana de matematicas
%D 2008
%P 167-181
%V 42
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/RCM_2008_42_2_a3/
%F RCM_2008_42_2_a3