Bodnar, D.I., and I.B. Bilanyk. “Convergence Criterion for Branched contіnued Fractions of the Special Form With Positive Elements”. Carpathian Mathematical Publications 9, no. 1 (June 8, 2017): 13–21. Accessed May 6, 2024. https://scijournals.pnu.edu.ua/index.php/cmp/article/view/1442.