FRATI, Fabrizio; KAUFMANN, Michael; PACH, János; TÓTH, Csaba; WOOD, David. On the Upward Planarity of Mixed Plane Graphs. Journal of Graph Algorithms and Applications, [S. l.], v. 18, n. 2, p. 253–279, 2014. DOI: 10.7155/jgaa.00322. Disponível em: https://jgaa.info/index.php/jgaa/article/view/paper322. Acesso em: 30 jun. 2024.