%0 Journal Article
%A B. Jessen
%A J. Karpf
%A A. Thorup
%T Some Functional Equations in Groups and Rings.
%J Mathematica Scandinavica
%D 1968
%P 257-265
%V 22
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MS2_1968__22_166049/
%F MS2_1968__22_166049