DmytrenkoS. O., KyurchevD. V., & PratsiovytyiM. V. (2009). $A_2$-continued fraction representation of real numbers and its geometry. Ukrains’kyi Matematychnyi Zhurnal, 61(4), 452-463. Retrieved from https://umj.imath.kiev.ua/index.php/umj/article/view/3033