1. R. M. Ali, “Coefficient of the inverse of strongly starlike functions,” Bull. Malays. Math. Sci. Soc., 26, 63–71 (2003).
2. P. L. Duren, “Univalent functions,” Grundlehren der Mathematischen Wissenschaften, vol. 259, Springer-Verlag, New York (1983).
3. T. Hayami and S. Owa, “Generalized Hankel determinant for certain classes,” Int. J. Math. Anal., 4(52), 2573–2585 (2010).
4. A. L. P. Hern, A. Janteng, and R. Omar, “Hankel determinant H2(3) for certain subclasses of univalent functions,” Math. Stat., 8, No. 5, 566–569 (2020); DOI: https://doi.org/10.13189/ms.2020.080510.
5. A. Janteng, S. A. Halim, and M. Darus, “Hankel determinant for starlike and convex functions,” Int. J. Math. Anal., 1, No. 13, 619–625 (2007).