%0 Journal Article
%A Jürg Rätz
%A Karl Baron
%T Orthogonal and additivity modulo a subgroup.
%J Aequationes mathematicae
%D 1993
%P 11-18
%V 46
%N 2-3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AM2_1993__46_2-3_137536/
%F AM2_1993__46_2-3_137536