Vakarchuk , S.B. (1992) “On diameters of some classes of analytical functions. II”., Ukrains’kyi Matematychnyi Zhurnal, 44(8), pp. 1135–1138. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/8048 (Accessed: 7 April 2025).