S. M. Vozna, K. Y. Kuchmins’ka, and Sus' О. M., “Approximation Properties of Two-Dimensional Continued Fractions”, Ukr. Mat. Zhurn., vol. 55, no. 1, pp. 30–44, Jan. 2003, Accessed: Feb. 17, 2026. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/3885