KRYVEN, Myroslav; RAVSKY, Alexander; WOLFF, Alexander. Drawing Graphs on Few Circles and Few Spheres. Journal of Graph Algorithms and Applications, [S. l.], v. 23, n. 2, p. 371–391, 2019. DOI: 10.7155/jgaa.00495. Disponível em: https://jgaa.info/index.php/jgaa/article/view/paper495. Acesso em: 30 jun. 2024.