%0 Journal Article %A Coufal, Oldřich %T Contributions to the theory of decompositions on a group %J Archivum mathematicum %D 1971 %P 23-28 %V 7 %N 1 %U http://geodesic.mathdoc.fr/item/ARM_1971_7_1_a2/ %G en %F ARM_1971_7_1_a2