RAMANUJAN, S. On Question 33° of Prof. Sanjana. The Journal of the Indian Mathematical Society, [S. l.], v. 4, n. 2, p. 59–61, 1912. DOI: 10.18311/jims/1912/17786. Disponível em: https://www.informaticsjournals.com/index.php/jims/article/view/17786. Acesso em: 3 may. 2024.