DI GIACOMO, Emilio; LIOTTA, Giuseppe; MONTECCHIANI, Fabrizio. Drawing Outer 1-planar Graphs with Few Slopes. Journal of Graph Algorithms and Applications, [S. l.], v. 19, n. 2, p. 707–741, 2015. DOI: 10.7155/jgaa.00376. Disponível em: https://jgaa.info/index.php/jgaa/article/view/paper376. Acesso em: 30 jun. 2024.