NEWTON, D. P. Periodic solutions of 3-beads on a ring and right-triangular billiards: Collisions of beads on a ring. Minnesota Journal of Undergraduate Mathematics, Minneapolis, MN, v. 4, n. 1, 2018. Disponível em: https://pubs.lib.umn.edu/index.php/mjum/article/view/4143. Acesso em: 3 may. 2024.