BAXTER, G.; JOICHI, J. T. On Permutations Induced by Commuting Functions, and an Embedding Question. MATHEMATICA SCANDINAVICA, [S. l.], v. 13, p. 140–150, 1963. DOI: 10.7146/math.scand.a-10696. Disponível em: https://www.mscand.dk/article/view/10696. Acesso em: 5 may. 2024.