%0 Journal Article
%A Karol Baron
%A Jürg Rätz
%T Orthogonality and additivity modulo a subgroup. (Summary).
%J Aequationes mathematicae
%D 1993
%P 323-323
%V 45
%N 2-3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/AM2_1993__45_2-3_137534/
%F AM2_1993__45_2-3_137534