CLAY, James R.; DOI, Donna K. Near-Rings with Identity on Alternating Groups. Mathematica Scandinavica, Berkeley, CA, United States, v. 23, p. 54–56, 1968. DOI: 10.7146/math.scand.a-10896. Disponível em: https://journals.msp.org/mscand/article/view/2456. Acesso em: 25 jul. 2026.