Hameed MI, Shihab BN. Several Subclasses of r-Fold Symmetric Bi-Univalent Functions possess Coefficient Bounds . Iraqi Journal of Science [Internet]. 2022 Dec. 30 [cited 2025 Dec. 5];63(12):5438-46. Available from: https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/5614