DORNHEIM, Christoph. Planar Graphs with Topological Constraints. Journal of Graph Algorithms and Applications, [S. l.], v. 6, n. 1, p. 27–66, 2002. DOI: 10.7155/jgaa.00044. Disponível em: https://jgaa.info/index.php/jgaa/article/view/paper44. Acesso em: 30 jun. 2024.