BHEMASENA RAO, M. Orthopole. The Journal of the Indian Mathematical Society, [S. l.], v. 3, n. 1, p. 27–27, 1911. DOI: 10.18311/jims/1911/17827. Disponível em: https://informaticsjournals.co.in/index.php/jims/article/view/17827. Acesso em: 8 nov. 2024.