KAPADIA, D. D. The Conic of Closest Contact. The Journal of the Indian Mathematical Society, [S. l.], v. 4, n. 3, p. 93–94, 1912. DOI: 10.18311/jims/1912/17756. Disponível em: https://informaticsjournals.com/index.php/jims/article/view/17756. Acesso em: 20 apr. 2024.