“Second Hankel Determinant for a Bi-Univalent Function Subclass Based Gegenbauer (Ultraspherical) Polynomials”.
European Journal of Pure and Applied Mathematics 18, no. 2 (May 1, 2025): 5968. Accessed February 23, 2026.
https://www.ejpam.com/ejpam/article/view/5968.