1. J. M. Chang, Normality of meromorphic functions and uniformly discrete exceptional sets, Comput. Methods Funct. Theory, 13 (2013), 47–63.
2. M. L. Fang and L. Zalcman, A note on normality and shared values, J. Aust. Math. Soc., 76 (2004), 141–150.
3. Y. X. Gu, A criterion for normality of families of meromorphic functions, Sci. Sinica, Special Issue I on Math. (1979), 267–274.
4. W. K. Hayman, Meromorphic Functions, Clarendon Press (Oxford, 1964).
5. P. Y. Niu and Y. Xu, Normality concerning shared functions, Houston J. Math., 41 (2015), 481–490.