Upper Distance k-Cost Effective Number in the Join of Graphs. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 13, n. 3, p. 701–709, 2020. DOI: 10.29020/nybg.ejpam.v13i3.3657. Disponível em: https://ejpam.com/index.php/ejpam/article/view/3657.. Acesso em: 19 jun. 2024.