LASHIN, A. Y. Coefficient estimates for two subclasses of analytic and bi-univalent functions. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 70, n. 9, p. 1289–1296, 2018. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1635. Acesso em: 5 dec. 2025.