@article{AM2_1978__17_136761,
     author = {J. Barnhardt},
     title = {Distributive groupoids and biassociativity. {(Short} {Communication).}},
     journal = {Aequationes mathematicae},
     pages = {388--389},
     year = {1978},
     volume = {17},
     zbl = {0418.22002},
     url = {http://geodesic.mathdoc.fr/item/AM2_1978__17_136761/}
}