Olubunmi A. Fadipe-Joseph, O. J. Windare, and Esther O. Davids. “Coefficient Bounds for a Class of Univalent Functions Involving the Modified Sigmoid Function”. Malaya Journal of Matematik 8, no. 02 (April 1, 2020): 454–458. Accessed December 4, 2024. https://www.malayajournal.org/index.php/mjm/article/view/1427.