N. ALKALLAK, I.; Z. SHA’BAN, R. A Survey of Two Optimization Methods to Solve a Modified Minimal Spanning Tree Problem in Undirected Tree Graph. AL-Rafidain Journal of Computer Sciences and Mathematics, [S. l.], v. 8, n. 1, p. 117–134, 2011. DOI: 10.33899/csmj.2011.163613 . Disponível em: https://csmj.uomosul.edu.iq/index.php/csmj/article/view/36887. Acesso em: 28 sep. 2025.