Gasteratos, Ioannis, Spiridon Kuruklis, and Thedore Kuruklis. “A Trigonometrical Approach to Morley‘s Observation”. CUBO, A Mathematical Journal 19, no. 2 (June 1, 2017): 73–85. Accessed May 16, 2024. https://cubo.ufro.cl/ojs/index.php/cubo/article/view/1579.