1. Abdel-Gawad, H.R., Thomas, D.K.: The Fekete-Szegö problem for strongly close-to-convex functions. Proc. Am. Math. Soc. 114, 345–349 (1992)
2. Al-Oboudi, F.M.: On univalent functions defined by a generalized Sãlãgean operator. Int. J. Math. Math. Sci. 27, 1429–1436 (2004)
3. Chonweerayoot, A., Thomas, D.K., Upakarnitikaset, W.: On the Fekete-Szegö theorem for close-to-convex functions. Publ. Inst. Math. (Beograd) (N.S.) 66, 18–26 (1992)
4. Darus, M., Thomas, D.K.: On the Fekete-Szegö theorem for close-to-convex functions. Math. Jpn. 44, 507–511 (1996)
5. Darus, M., Thomas, D.K.: On the Fekete-Szegö theorem for close-to-convex functions. Math. Jpn. 47, 125–132 (1998)