ELLIOTT, George A.; HANDELMAN, David E. Extending traces to factorial traces. Mathematica Scandinavica, Berkeley, CA, United States, v. 49, p. 95–98, 1981. DOI: 10.7146/math.scand.a-11923. Disponível em: https://journals.msp.org/mscand/article/view/1744. Acesso em: 25 jul. 2026.