Olatunji, Sunday Oluwafemi, and Hemen Dutta. “Fekete-Szegö Problem for Certain Classes of Analytic Functions Associated With Petal Type Domain and Modified Sigmoid Function”. Science & Technology Asia 24, no. 4 (November 4, 2019): 144–152. Accessed March 28, 2024. https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/185469.