1. Duren PL: Univalent functions. In Grundlehren der Mathematischen Wissenschaften. Volume 259. Springer, New York; 1983.
2. Sakaguchi K: On a certain univalent mapping. J Math Soc Japan 1959, 11: 72–75. 10.2969/jmsj/01110072
3. Gao C, Zhou S: On a class of analytic functions related to the starlike functions. Kyungpook Math J 2005,45(1):123–130.
4. Wang Z, Gao C, Yuan S: On certain subclass of close-to-convex functions. Acta Math Acad Paedagog Nyházi (N. S.) 2006,22(2):171–177. (electronic)
5. Wang ZG, Chen DZ: On a subclass of close-to-convex functions. Hacet J Math Stat 2009,38(2):95–101.