DANI, J. S. Density Properties of Orbits under Discrete Groups. The Journal of the Indian Mathematical Society, [S. l.], v. 39, n. 1-4, p. 189–218, 1975. Disponível em: https://www.informaticsjournals.com/index.php/jims/article/view/16647. Acesso em: 2 may. 2024.