MOHAR, Bojan; ŠKODA, Petr. Minimizing the Number of Label Transitions Around a Nonseparating Vertex of a Planar Graph. Journal of Graph Algorithms and Applications, [S. l.], v. 16, n. 2, p. 225–241, 2012. DOI: 10.7155/jgaa.00256. Disponível em: https://jgaa.info/index.php/jgaa/article/view/paper256. Acesso em: 30 jun. 2024.