S. O. Dmytrenko, D. V. Kyurchev, and M. V. Pratsiovytyi, “$A_2$-continued fraction representation of real numbers and its geometry”, Ukr. Mat. Zhurn., vol. 61, no. 4, pp. 452–463, Apr. 2009, Accessed: Dec. 07, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/3033