L. Vanitha, K. Dhanalakshmi, and C. Ramachandran. “On Third Order Hankel Determinant for Some Special Class of Analytic Functions Related With Generalized Sakaguchi Functions”. International Journal of Mathematics And Its Applications, vol. 6, no. 4, Dec. 2018, pp. 163-7, http://ijmaa.in/index.php/ijmaa/article/view/339.