NAKANO, Shin-ichi. A Simple Algorithm for $r$-gatherings on the Line. Journal of Graph Algorithms and Applications, [S. l.], v. 23, n. 5, p. 837–845, 2019. DOI: 10.7155/jgaa.00514. Disponível em: https://jgaa.info/index.php/jgaa/article/view/paper514. Acesso em: 30 jun. 2024.