%0 Journal Article %A M.A. Taylor %T R-and T-Groupoids: A Generalization of Groups. %J Aequationes mathematicae %D 1975 %P 242-248 %V 12 %I mathdoc %U http://geodesic.mathdoc.fr/item/AM2_1975__12_136513/ %F AM2_1975__12_136513