Vakarchuk S. B. “On Diameters of Some Classes of Analytical Functions. II.”. Ukrains’kyi Matematychnyi Zhurnal 44, no. 8 (September 8, 1992): 1135-1138. Accessed November 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/8048.