[1] Cao T B, Yi H X. On the uniqueness of meromorphic functions that share four values in one angular domain. J Math Anal Appl, 2009, 358: 81--97

[2] Lin W C, Mori S, Tohge K. Uniqueness theorems in an angular domain. Tohoku Math J, 2006, 58: 509--527

[3] Lin W C, Mori S, Yi H X. Uniqueness theorems of entire functions with shared-set in an angular domain. Acta Math Sin, 2008, 24: 1925--1934

[4] Li Y H, Qiao J Y. The Uniqueness of meromorphic functions concerning small functions. Sci China (Ser A), 2000, 43: 581--590

[5] Steinmetz N. Eine verallgemeimerung des zweiten navanlinnaschen hauptsatzes. J Reine Angew Math, 1986, 386: 134--141

[6] Valiron G. Recherches sur le th\'{e}or\`{e}me de M. Borel dans la th\'{e}orie des fonctions m\'{e}romorphes. Acta Math, 1929, 52: 67--92

[7] Yang C C, Yi H X. Uniqueness Theory of Meromorphic Functions. New York: Kluwer Academic Publishers, 2003

[8] Zheng J H. On uniqueness of meromorphic functions with shared values in one angular domain. Complex Var Theory
 Appl, 2003, 48: 777--785

[9] Zheng J H. On uniqueness of meromorphic functions with shared values in some angular domains. Canad J Math, 2004, 47: 152--160

[10] Zheng J H. Value Distribution of Meromorphic Functions. Beijing: Springer and Tsinghua University Publishing House, 2010

[11] Zhang Q C. Meromorphic functions sharing values in an angular domain. J Math Anal Appl, 2009, 349: 100--112

[12] 张庆德. 亚纯函数关于慢增长函数的一个唯一性定理. 数学学报, 1993, 36: 826--833