%0 Journal Article %A János Aczél %T Functions of Binomial Type Mapping Groupoids into Rings. %J Mathematische Zeitschrift %D 1977 %P 115-124 %V 154 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1977__154_172515/ %F MZ_1977__154_172515