[1]W. K. Hayman, Piacad values of meromorphic functions and their derivatives, Ann. Math., 70, 1959, 9-42.
[2]W. K. Hayman, Research Problems in Function Theory, Athlone Press, London, 1967. [3]D. Drasin, Normal families and Nevanlinna theory, Acta Math, 122, 1969, 231-263.
[4]Y. S. Ye, A new criterion and its application, Chinese Ann. Math. Ser. A, 12(Supplement), 1991, 44-49.
[5]S. Y. Li, On normality criterion of a class of the functions, J. Fujian Normal Univ., 2, 1984, 156-158.
[6]X. J. Li, Proof a Hayman's conjecture on normal families, Sci. China Ser. A, 28, 1985, 596-603. [7]J. Langley, On normal families and a result of Drasin, Proc. Roy. Soc. Edinburgh Sect. A, 98, 1984, 385-393.
[8]X. C. Pang, On normal criterion of meromorphic functions, Sci. China Ser. A, 33, 1990, 521-527.
[9]H. H. Chen and M. L. Fang, On the value distribution of $f^{n}f'$, Sci. China Ser. A, 38, 1995, 789-798.
[10]X. C. Pang, Normality conditions for differential polynomials, Kexue Tongbao, 33, 1988, 1690-1693.
[11]W. Schwick, Normality criteria for families of meromorphic functions, J. Analyse Math, 52, 1989, 241-289.
[12]H. H. Chen and X. H. Hua, Normal families of holomorphic functions, J. Austral. Math. Soc. Ser. A, 59, 1995, 112-117.
[13]Y. S. Ye and X. C. Pang, On the zeros of a differential polynomial and normal families, J. Math. Anal Appl, 205, 1997, 32-42.
[14]Y. Xu, Normal families of meromorphic functions, J. Math Wuhan, 21, 2001, 381-386.
[15]H. H. Chen and Y. X. Gu, Improvement of Marty's criterion and its application, Sci. China Ser. A, 36, 1993, 674-681.
[16]W. Schwick, Sharing values and normality, Arch. Math, 59, 1992, 50-54.
[17]Q. C. Zhang, Normal families of meromorphic functions concerning shared values, J. Math. Anal Appl. 338, 2008, 545-551.
[18]H. L. Qiu, D. Liu and M. L. Fang, Hayman's question concerning normal families and shared values, Sci. China Ser., 42, 2012, 603-610.
[19]杨乐. 值分布理论及其新研究[M]. 北京: 科学出版社, 1982.
[20]顾永兴, 庞学诚, 方明亮. 正规族理论及其应用[M]. 北京: 科学出版社, 2007. [21]Lars V. Ahlfors. Complex Analysis, Third Edition. Mcgraw-Hill Book Co, 1979.
[22]X. C. Pang and L. Zalcman, Normal families and shared values, Bull. London Math. Soc, 32, 2000, 325-331.
[23]L. Zalcman, Normal families: New perspectives, Bull Amer Math Soc, 35, 1998, 215-230. [24]J. Clunie, On integral and meromorphic functions, J. London Math. Soc, 37, 1962, 17-27.
[25]N. Steinmetz, $\\ddot{U}$ber die Nullstellen von Differentialpolynomen, Math. Z., 176, 1981, 255-264.
[26]W. Bergweiler and A. Eremenko, On the singularities of the inverse to a meromorphic function of finite order, Rev. Mat. Iberoamericana, 11, 1995, 355-373.
[27]W. K. Hayman, Meromorphic Functions, Clarendon Press, Oxford, 1964. [28] Mues E. über ein problem von Hayman[J]. Math Z, 1979,164: 239-259.
[29] Zhang J L, Gao Z S and Li S. Distribution of zeros and shared values of difference operators[J]. Annales Polonici Mathematici, 2011, 102(3): 213-221. [30] Chiang Y M and Feng S J. On the Nevanlinna characteristic of f(z+h) and difference equations in the complex plane[J]. Ramanujan J, 2008, 16(1): 105-129.
[31] Xu J F and Zhang X B. The zeros of q-shift difference polynomial of meromorphic functions[J]. Advance in Difference Equations, 2012, 2012: 200.
[32] Halburd R G and Korhonen R J. Nevanlinna theory for the difference operator[J]. Ann Acad Sci Fenn, 2006, 31: 463-478.
[33] Barnett D C, Halburd R G, Korhonen R J and Morgan W. Nevanlinna theory for the
q-difference operator and meromorphic solutions of q-difference equations[J]. Proceedings of the Royal Society of Edinburgh, 2007, A137: 457-474,.
[34] Yang C C and Hua X H. Uniqueness and value sharing of meromorphic functions[J]. Ann Acad Sci Fenn Math, 1997, 22(2), 395-406.
[24]L. Yang, Value Distribution Theory, Springer-Verlag, Berlin, 1993. [25]J. Schiff, Normal Families, Springer-Verlag, 1993.