HAO, S. .; ZHONG, G.; MA, X. Notes on the Co-prime Order Graph of a Group. Proceedings of the Bulgarian Academy of Sciences, Sofia, Bulgaria, v. 75, n. 3, p. 340–348, 2022. DOI: 10.7546/CRABS.2022.03.03. Disponível em: https://www.proceedings.bas.bg/index.php/cr/article/view/41. Acesso em: 19 oct. 2026.