Associativity of the Commutator Operation in Groups. São Paulo Journal of Mathematical Sciences, [S. l.], v. 3, n. 2, p. 231–240, 2009. DOI: 10.11606/issn.2316-9028.v3i2p231-240. Disponível em: https://periodicos.usp.br/spjournal/article/view/45.. Acesso em: 8 abr. 2025.