DMYTRENKO, S. O.; KYURCHEV, D. V.; PRATSIOVYTYI, M. V. $A_2$-continued fraction representation of real numbers and its geometry. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 61, n. 4, p. 452–463, 2009. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3033. Acesso em: 7 dec. 2025.