Chen, Bang-Yen. “Rectifying Curves and Geodesics on a Cone in the Euclidean 3-Space”. Tamkang Journal of Mathematics 48, no. 2 (June 30, 2017): 209–214. Accessed April 29, 2024. https://journals.math.tku.edu.tw/index.php/TKJM/article/view/2382.