Solanilla, Leonardo, Óscar Palacio, and Uriel Hernández. “A Simple Proof of Abel’s Theorem on the Lemniscate”. Ingeniería y Ciencia 6, no. 12 (December 1, 2010): 43–49. Accessed February 11, 2026. https://publicaciones.eafit.edu.co/index.php/ingciencia/article/view/331.