BACHMAIER, Christian; BRANDENBURG, Franz; FORSTER, Michael. Radial Level Planarity Testing and Embedding in Linear Time. Journal of Graph Algorithms and Applications, [S. l.], v. 9, n. 1, p. 53–97, 2005. DOI: 10.7155/jgaa.00100. Disponível em: https://jgaa.info/index.php/jgaa/article/view/paper100. Acesso em: 30 jun. 2024.