[1] W.K.Hayman, Meromorphic functions, Clarendon Press, Oxford, 1964
[2] L.Yang, Value distribution theory, Springer-Verlag, Berlin, 1993
[3] K.Niino, and M.Ozawa, Deficiencies of an entire algebroid function, Kodai Math. Sem. Rep., vol.22, pp.98-113, 1970
[4] H.X.Yi, and C.C.Yang, Unicity theory of meromorphic functions(In Chinese), Science Press, Beijing, 1995
[5] W.K.Hayman, Waring’s problem für analytische Funktionen, Bayer. Akad. Wiss. Math.-Natur. Kl. Sitzungsber, pp.1-13, 1985
[6] G.G.Gundersen, Meromorphic solutions of f6+g6+h6≡6661, Analysis, vol.18, pp.285-290, 1998
[7] M.L.Fang, and X.H.Hua, Entire functions that share one small function, J. of Nanjing Univ. Mathematical Biquarterly, vol.17, no.2, pp.167-172, 2000