JOURDAIN, P. E. B. Reviews. The Journal of the Indian Mathematical Society, [S. l.], v. 5, n. 1, p. 20–23, 1913. DOI: 10.18311/jims/1913/17746. Disponível em: https://www.informaticsjournals.com/index.php/jims/article/view/17746. Acesso em: 3 may. 2024.