EPPSTEIN, David. Bipartite and Series-Parallel Graphs Without Planar Lombardi Drawings. Journal of Graph Algorithms and Applications, [S. l.], v. 25, n. 1, p. 549–562, 2021. DOI: 10.7155/jgaa.00571. Disponível em: https://jgaa.info/index.php/jgaa/article/view/paper571. Acesso em: 30 jun. 2024.