EIGLSPERGER, Markus; SIEBENHALLER, Martin; KAUFMANN, Michael. An Efficient Implementation of Sugiyama’s Algorithm for Layered Graph Drawing. Journal of Graph Algorithms and Applications, [S. l.], v. 9, n. 3, p. 305–325, 2005. DOI: 10.7155/jgaa.00111. Disponível em: https://jgaa-v4.cs.brown.edu/index.php/jgaa/article/view/paper111. Acesso em: 3 jul. 2025.