Corona-Corona, Gulmaro. “About the Proof of the L’Hôpital’s Rule”. American Scientific Research Journal for Engineering, Technology, and Sciences 41, no. 1 (April 1, 2018): 240–245. Accessed May 18, 2024. https://www.asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/3982.