ISA GARBA, A.; EJIMA, O.; OLALEKAN AREMU, K. Vertex relations of order divisor graphs of subgroups of finite groups. Journal of the Nigerian Mathematical Society, [S. l.], v. 39, n. 3, p. 315–322, 2021. Disponível em: https://ojs.ictp.it/jnms/index.php/jnms/article/view/583. Acesso em: 12 apr. 2021.