LashinA. Y. “Coefficient Estimates for Two Subclasses of Analytic and Bi-Univalent Functions”. Ukrains’kyi Matematychnyi Zhurnal 70, no. 9 (September 25, 2018): 1289-1296. Accessed November 21, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/1635.