[1]
Galperіn I. M., “Theorem of distortion for functions confined in a unit circle”, Ukr. Mat. Zhurn., vol. 18, no. 1, pp. 107–109, Jan. 1966, Accessed: Feb. 17, 2026. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/8659