FUKUYAMA, Junichiro. NP-completeness of the Planar Separator Problems. Journal of Graph Algorithms and Applications, [S. l.], v. 10, n. 2, p. 317–328, 2006. DOI: 10.7155/jgaa.00130. Disponível em: https://jgaa.info/index.php/jgaa/article/view/paper130. Acesso em: 21 dec. 2024.