CLAY, James R.; MALONE, Joseph J. ,. Jr. The Near-Rings with Identities on Certain Finite Groups. Mathematica Scandinavica, Berkeley, CA, United States, v. 19, p. 146–150, 1966. DOI: 10.7146/math.scand.a-10803. Disponível em: https://journals.msp.org/mscand/article/view/2538. Acesso em: 25 jul. 2026.