BAGCHI, B.; SINHA, A. A Classification of Classical Billiard Trajectories. Journal of Informatics and Mathematical Sciences, [S. l.], v. 1, n. 1, p. 43–53, 2009. DOI: 10.26713/jims.v1i1.8. Disponível em: http://www.rgnpublications.com/journals/index.php/jims/article/view/8. Acesso em: 4 may. 2024.