HALLDÓRSSON, Magnús. Approximations of Weighted Independent Set and Hereditary Subset Problems. Journal of Graph Algorithms and Applications, [S. l.], v. 4, n. 1, p. 1–16, 2000. DOI: 10.7155/jgaa.00020. Disponível em: https://jgaa.info/index.php/jgaa/article/view/paper20. Acesso em: 30 jun. 2024.