[1]  Bergweiler W, Eremenko A. On the singularities of the inverse of a meromorphic function of finite order. Rev Mat Iberoamericana, 1995, 11:  355--373

[2]  Bergweiler W. On the zeros of certain homogeneous differential polynomial.  Arch Math (Basel), 1995, 64: 199--202

[3]  Chen H, Fang M. On a theorem of Drasin.  Adv in Math (China), 1991, 20: 504

[4]  Chen H, Fang M. On the distribution of $f^nf'$.  Science in China, 1995, 38: 121--127

[5]  Chen H, Gu Y. Improvement of Marty's criterion and its application.  Sci China (Ser A), 1993, 36: 674--681

[6]  Drasin D. Normal families and Nevanlinna theory. Acta Math, 1969, 122: 231--263

[7]  Fang M, Yuan W. On the normality for families of meromorphic functions. Indian J Math, 2001, 43: 341--350

[8]  Gu Y. An normal criterion of meromorphic families. Sci Sinica, Math Issue, 1979,  I: 267--274

[9]  Gu Y, Pang X, Fang M. The Theory of Normal Family and Its Applications. Beijing: Science Book Concern,  2007

[10]  Hayman W. Picard values of meromorphic functions and their derivatives. Ann of Math, 1959, 70: 9--42

[11]  Hayman W. Research Problems in Function Theory. London: Athlone Press, 1967

[12]  Hua X. On a problem of Hayman.  Kodai Math J, 1990, 13:  386--390

[13]  Huang X, Gu Y. Normal families of meromorphic functions. Result Math, 2006, 49: 279-288

[14]  Langley J. On normal families and a result of Drasin.  Proc of the Royal Soc of Edinburg, 98A:  385--393

[15]  Li S. The normality criterion of a class of the functions. J of the Fujian Normal Univ, 1984, 2: 156--158

[16]  Li X. Proof of Hayman's conjecture on normal families. Sci Sinica, 1985, 28:  596--603

[17]  Pang X. Bloch's principle and normal criterion.  Sci China (Ser A), 1989, 32: 782--791

[18]  Pang X. On normal criterion of meromorphic fuctions. Sci China (Ser A), 1990, 33:  521--527

[19]  Pang X, Zalcman L. Normal families and shared values. The London Mathematical Society, 2000, 32(3): 325--331

[20]  Pang X, Yang D, Zalcman L. Normal families of meromorphic functions omitting a function Ⅱ (to appear)

[21]  Schiff J. Normal Families.  New York, Berlin:  Springer-Verlag, 1993

[22]  Wang Y, Fang M. Picard values and normal families of meromorphic function with multiple zeros. Acta Math Sinica (New Series), 1998, 14:  17--26

[23]  Yang L. Meromorphic functions and their derivatives.  J London Math Soc, 1982, 25(2):  288--296

[24]  Yang Y. Normal families and fix-point of meromorphic functions.  Indiana Univ Math J, 1986, 35: 179--191

[25]  Yang Y. Normality for family of meromorphic functions. Sci Sinica (Ser A), 1986, 29: 1263--1274

[26]  Ye Y. A new criterion and its application. Chin Ann (Ser A), 1991, 2: 44--49

[27]  Zalcman L. A heuristic principle in complex function theory. Amer Math Monthly, 1975, 82: 813--817

[28]  Zalcman L. Normal families: new perspectives. Bull Amer Math Soc, 1998, 35: 215--230