%0 Journal Article %A J. Gilewski %T Generalized convolutions and delphic semigroups %J Colloquium Mathematicum %D 1972 %P 281-289 %V 25 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-25-2-281-289/ %R 10.4064/cm-25-2-281-289 %G en %F 10_4064_cm_25_2_281_289