LIU, S.; LUO, X.; JIANG, H. Finite Groups Whose All Proper Subgroups Have Only Irreducible Characters of Square-free Degrees. Proceedings of the Bulgarian Academy of Sciences, Sofia, Bulgaria, v. 77, n. 4, p. 477–484, 2024. DOI: 10.7546/CRABS.2024.04.01. Disponível em: https://proceedings.bas.bg/index.php/cr/article/view/514. Acesso em: 6 oct. 2026.