1. O.P. Ahuja, M. Kasthuri, G. Murugusundaramoorthy, K. Vijaya, Upper bounds of second Hankel determinant for universally prestarlike functions, J. Korean Math. Soc., 55 (2018) №5, 1019–1030.
2. P.L. Duren, Univalent Functions, Grundlehren der Mathematischen Wissenschaften, Band 259, Springer-Verlag, New York, Berlin, Heidelberg and Tokyo, 1983.
3. M. Fekete, G. Szeg¨o, Eine Bemerkung ¨uber ungerade schlichte Funktionen, J. London. Math. Soc., 8 (1933), 85–89.
4. U. Grenander, G. Szeg¨o, Toeplitz forms and their applications, Univ. of California Press, Berkeley and Los Angeles, 1958.
5. A. Janteng, S.A. Halim, M. Darus, Hankel determinant for starlike and convex functions, Int. J. Math. Anal, 1 (13-16) (2007), 619—625.