Hamzat JO, Akinwale FI. Bi-Univalent Condition Associated with the Modified Sigmoid Function. Nep J. Math. Sci. [Internet]. 2022 Aug. 31 [cited 2024 Nov. 21];3(1):1-10. Available from: https://nepjol.info/index.php/njmathsci/article/view/44094