On k-Cost Effective Domination Number in the Join of Graphs. European Journal of Pure and Applied Mathematics, Maryland, USA, v. 14, n. 4, p. 1324–1336, 2021. DOI: 10.29020/nybg.ejpam.v14i4.4127. Disponível em: https://ejpam.com/index.php/ejpam/article/view/4127.. Acesso em: 3 jul. 2024.