1. Ali, R.M., Lee, S.K., Ravichandran, V., Subramaniam, S.: Coefficient estimates for bi-univalent Ma-Minda starlike and convex functions. Appl. Math. Lett. 25, 344–351 (2012)
2. Altinkaya, Ş, Yalçin, S.: Upper bound of second Hankel determinant for bi-Bazilevic functions. Mediterr. J. Math. 13, 4081–4090 (2016)
3. Adegani, E.A., Bulut, S., Zireh, A.: Coefficient estimates for a subclass of analytic bi-univalent functions. Bull. Korean Math. Soc. 55, 405–413 (2018)
4. Brannan, D.A., Taha, T.S.: On some classes of bi-univalent functions. Stud. Univ. Babeş-Bolyai Math. 31, 70–77 (1986)
5. Bulut, S.: Coefficient estimates for a new subclass of analytic and bi-univalent functions defined by Hadamard product. J. Complex Anal. 2014, 302019 (2014)