@article{AM2_1974__11_136473,
     author = {M.A. Taylor},
     title = {R-and {T-Groupoids:} {A} {Generalization} of {Groups.} {(Short} {Communication).}},
     journal = {Aequationes mathematicae},
     pages = {318--319},
     publisher = {mathdoc},
     volume = {11},
     year = {1974},
     url = {http://geodesic.mathdoc.fr/item/AM2_1974__11_136473/}
}