RAMASWAMI AIYAR, V. THE Orthopolar Theory. The Journal of the Indian Mathematical Society, [S. l.], v. 4, n. 6, p. 213–216, 1912. DOI: 10.18311/jims/1912/17748. Disponível em: https://informaticsjournals.com/index.php/jims/article/view/17748. Acesso em: 6 may. 2024.