BODLAENDER, Hans; WOLLE, Thomas; KOSTER, Arie. Contraction and Treewidth Lower Bounds. Journal of Graph Algorithms and Applications, [S. l.], v. 10, n. 1, p. 5–49, 2006. DOI: 10.7155/jgaa.00117. Disponível em: https://jgaa.info/index.php/jgaa/article/view/paper117. Acesso em: 30 jun. 2024.