Triple Crossing Numbers of Graphs. Communications in Mathematical Research, [S. l.], v. 32, n. 1, p. 1–38, 2021. DOI: 10.13447/j.1674-5647.2016.01.01. Disponível em: https://global-sci.com/index.php/cmr/article/view/8871. Acesso em: 6 dec. 2025.