RAMASWAMI AIYAR, V. Normals to an Ellipse from any given Point. The Journal of the Indian Mathematical Society, [S. l.], v. 3, n. 2, p. 75–76, 1911. DOI: 10.18311/jims/1911/17817. Disponível em: https://www.informaticsjournals.com/index.php/jims/article/view/17817. Acesso em: 7 may. 2024.