TY  - JOUR
AU  - Jürg Rätz
AU  - Karl Baron
TI  - Orthogonal and additivity modulo a subgroup.
JO  - Aequationes mathematicae
PY  - 1993
SP  - 11
EP  - 18
VL  - 46
IS  - 2-3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1993__46_2-3_137536/
ID  - AM2_1993__46_2-3_137536
ER  -