CLAY, James R.; DOI, Donna K. Near-Rings with Identity on Alternating Groups. MATHEMATICA SCANDINAVICA, [S. l.], v. 23, p. 54–56, 1968. DOI: 10.7146/math.scand.a-10896. Disponível em: https://tidsskrift.dk/math/article/view/10896. Acesso em: 13 aug. 2026.