LAHIRI, B. K. On Translations of Sets in Topological Groups. The Journal of the Indian Mathematical Society, [S. l.], v. 39, n. 1-4, p. 173–180, 1975. Disponível em: https://www.informaticsjournals.com/index.php/jims/article/view/16645. Acesso em: 4 may. 2024.