YAO Wei-Hong. TWO ENTIRE FUNCTIONS SHARING FOUR SMALL FUNCTIONS IN THE SENSE OF Ek)(B, f) = Ek)(B, g)[J].Acta mathematica scientia,Series B, 2003, 23(1): 23-32.
[5]Yi H X, Yang C C. Uniqueness Theory of Meromorphic Functions (in Chinese). Beijing: Science Press,1995
[6]Hayman W K. Meromorphic Functions. Oxford: Clarendon Press, 1964
[7]Mues E. Meromorphic functions sharing four values. Complex Variables Theory Appl, 1989, 12(4): 169-179
[8]Zhang Qingde. A uniqueness theory for meromorphic functions with respect to slowly growing functions.Acta Math Sinica, 1993, 36(4): 826-833 (in Chinese)