[1] SCHWICK W.Sharing Values and Normality [J].Arch. Math.,1992,59:50-54.[2] CHEN H H,FANG M L.Shared Values and Normal Families of Meromorphic Functions [J].J. Math. Anal. Appl.,2001,260:124-132.[3] HAN Ming-hua,GU Yong-xing.The Normal Famility of Meromorphic Functions [J].Acta Mathematica Scientia,2008,28(4):759-762.[4] PANG Xue-cheng,ZALCMAN L.Normal Families and Shared Values [J].Bull. London Math. Soc.,2000,3:325-331.[5] BERGWEILER W,WEWMENKO A.On the Singularities of the Inverse to a Meromorphic Functions of Finite Order [J].Rev. Mat. Iberoamericana,1995,11:355-373.[6] WANG Yue-fei,FANG Ming-liang.Picard Values and Normal Families of Meromorphic Function with Multiple Zeros [J].Acta Mathematica Sinica,1998,41(4):743-748.