Dmytrenko, S.O., Kyurchev, D.V. and Pratsiovytyi, M.V. (2009) “$A_2$-continued fraction representation of real numbers and its geometry”, Ukrains’kyi Matematychnyi Zhurnal, 61(4), pp. 452–463. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/3033 (Accessed: 7 December 2025).