BILAL, H.; AHMED, S.; MAHMOOD, H.; BINYAMIN, M. The NF-Number of Two Complete Graphs Joined by a Common Vertex. Proceedings of the Bulgarian Academy of Sciences, Sofia, Bulgaria, v. 75, n. 5, p. 640–648, 2022. DOI: 10.7546/CRABS.2022.05.02. Disponível em: https://proceedings.bas.bg/index.php/cr/article/view/75. Acesso em: 14 aug. 2022.