%0 Journal Article %A Claudi Alsina %T On a method of Pi-Calleja for describing additive generators of associative functions. %J Aequationes mathematicae %D 1992 %P 14-20 %V 43 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/AM2_1992__43_1_137439/ %F AM2_1992__43_1_137439