@article{GDZPPN002040212, title = {Orthogonality and additivity modulo a subgroup. (Summary).}, journal = {Aequationes mathematicae}, volume = {45}, year = {1993}, pages = {323-323}, zbl = {0789.39004}, url = {http://dml.mathdoc.fr/item/GDZPPN002040212} }
Baron, Karol; Rätz, Jürg. Orthogonality and additivity modulo a subgroup. (Summary).. Aequationes mathematicae, Tome 45 (1993) p. 323. http://gdmltest.u-ga.fr/item/GDZPPN002040212/