WILKINSON, A. C. L. On Question 494. The Journal of the Indian Mathematical Society, [S. l.], v. 6, n. 6, p. 216–220, 1914. DOI: 10.18311/jims/1914/17686. Disponível em: https://www.informaticsjournals.com/index.php/jims/article/view/17686. Acesso em: 29 apr. 2024.