BUCKLEY, Stephen M.; MACHALE, Desmond. Commuting probability for subrings and quotient rings. Journal of Algebra Combinatorics Discrete Structures and Applications, [S. l.], v. 4, n. 2, p. 189–196, 2017. Disponível em: https://jacodesmath.com/index.php/jacodesmath/article/view/68. Acesso em: 3 sep. 2026.