DASARI NAGA VIJAY KRISHNA. Another New Proof of the Butterfly Theorem. International Journal of Mathematics And its Applications, [S. l.], v. 5, n. 1 - A, p. 55–57, 2017. Disponível em: https://ijmaa.in/index.php/ijmaa/article/view/751. Acesso em: 22 jul. 2024.