Patil AB, Shaba TG. Sharp initial coefficient bounds and the Fekete–Szegö problem for some certain subclasses of analytic and bi-univalent functions. Ukr. Mat. Zhurn. [Internet]. 2023 Mar. 2 [cited 2025 Apr. 13];75(2):198-206. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/6602