CsimaG., and Szirmai J. “Isoptic Curves of Generalized Conic Sections in the Hyperbolic Plane”. Ukrains’kyi Matematychnyi Zhurnal 71, no. 12 (December 25, 2019): 1684-1698. Accessed November 21, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/2287.