[1] Hayman W K. Meromorphic Functions. Oxford: Claredon Press, 1964

[2] Yi H X,  Yang C C. Uniqueness Theory of Meromorphic Functions. Beijing: Science Press, 1995

[3] Yang C C,  Hua X H. Uniqueness and value-sharing of meromorphic functions. Ann Acad  Sci Fenn Math, 1997, 22(2): 395--406

[4]  Xu Y,  Qiu H L. Entire functions  sharing one value IM. Indina J  Pure Appl  Math, 2000, 31: 849--855

[5]  Fang M L. Uniqueness and value-sharing of entire functions. Comput  Math Appl, 2002, 44: 823--831

[6] Chen J F,  et al. Uniqueness of entire function that share one value. Comput  Math  Appl, 2008, 56: 3000--3014

[7] Zhang Q C. Meromorphic Functions  that shares one small function with its derivative. J Inequal Pure Appl Math, 2005, 6(4): Art 116

[8]  Lahiri I, Sarkar A. Uniqueness of a meromorphic function and its derivative. J Inequal Pure Appl Math, 2004, 5(1): Art 20

[9] Yi H X. Uniqueness of meromorphic functions and a question of Yang C C. Complex Var Theory Appl, 1990, 14: 169--176

[10] Yi H X. Meromorphic functions sharing one or two values. Complex Var Theory Appl, 1995, 28(1): 1--11

[11]  Banerjee A. Meromorphic functions sharing one value. Int J Math Sci, 2005, 22: 3587--3598

[12]  Yao W H. Two entire functions sharing four small functions in the sense of E_k）(β, f)=E_k)(β, g). Acta Math Sci, 2003, 23B(1): 23--32