Experimenting with the Identity (xy)z = y(zx). - Irvin Roy Hentzel; David Pokrass Jacobs; Sekhar V. Muddana (J. Symb. Comput., 1993)

The Word Problem for Free Partially Commutative, Partially Associative Groupoids. - David Pokrass Jacobs; Sekhar V. Muddana (J. Symb. Comput., 1993)