CLAY, James R.; MALONE, Joseph J. ,. Jr. The Near-Rings with Identities on Certain Finite Groups. MATHEMATICA SCANDINAVICA, [S. l.], v. 19, p. 146–150, 1966. DOI: 10.7146/math.scand.a-10803. Disponível em: https://www.mscand.dk/article/view/10803. Acesso em: 5 dec. 2025.