PARIKH, R. On Nonuniqueness in Transfinite Progressions. The Journal of the Indian Mathematical Society, [S. l.], v. 31, n. 1, p. 23–30, 1967. DOI: 10.18311/jims/1967/16787. Disponível em: https://www.informaticsjournals.com/index.php/jims/article/view/16787. Acesso em: 4 may. 2024.