VOZNA, S. M.; KUCHMINS’KA, Kh. Yo.; Sus' О. M. Approximation Properties of Two-Dimensional Continued Fractions. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 55, n. 1, p. 30–44, 2003. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3885. Acesso em: 6 dec. 2025.