|   [1] Chen Z X. On value distribution of difference polynomials of meromorphic functions. Abst Appl Anal, 2011, Article ID 239853, 9 pages 
 
[2] Chen Z X, Shon K H. On zeros and fixed points of differences of meromorphic functions. J Math Anal Appl, 2008, 344(1): 373–383 
 
[3] Chiang Y M, Feng S J. On the Nevanlinna characteristic of f(z+η) and difference equations in the complex plane. Ramanujan J, 2008, 16(1): 105–129 
 
[4] Gross F. Factorization of Meromorhpic Functions. Washinton, DC: US Government Printing Office, 1972 
 
[5] Halburd R G, Korhonen R J. Nevanlinna theory for the difference operator. Ann Acad Sci Fenniæ: Math-ematica, 2006, 31(2): 463–478 
 
[6] Halburd R G, Korhonen R J. Difference analogue of the lemma on the logarithmic derivative with applica-tions to difference equations. J Math Anal Appl, 2006, 314(2): 477–487 
 
[7] Hayman W K. Picard values of meromorphic functions and their derivatives. Ann Math, 1959, 70: 9–42 
 
[8] Hayman W K. Meromorphic Functions. Oxford: Clarendon Press, 1964 
 
[9] Heittokangas J, Korhonen R, Laine I, Rieppo J, Zhang J. Value sharing results for shifts of meromorphic functions and sufficient conditions for periodicity. J Math Anal Appl, 2009, 355(1): 352–363 
 
[10] Huang Z B, Chen Z X, Li Q. On properties of meromorphic solutions for complex difference equation of 
Malmquist type. Acta Math Sci, 2013, 33B(4): 1141–1152 
 
[11] Liu K, Laine I. A note on value distribution of difference polynomials. Bull Aust Math Soc, 2010, 81(3): 353–360 
 
[12] Mohon’ko A Z. The Nevanlinna characteristics of certain meromorphic functions Teorija Funkciˇ?. Funkcional’nyˇ? Analiz i ih Priloˇzenija, 1971, 14: 83–87 
 
[13] Valiron G. Sur la d´eriv´ee des fonctions alg´ebro ?des. Bull Soc Math France, 1931, 59: 17–39 
 
[14] Yang C C, Yi H X. Uniqueness Theory of Meromorhpic Functions. Vol 557 of Mathematics and Its Appli-cations. Dordrecht, The Netherlands: Kluwer Academic Publishers, 2003 
 
[15] Yang L. Value Distribution Theory. Berlin: Springer, 1993 
 
[16] Zhang R R, Chen Z X. On meromorphic solutions of Riccati and linear difference equations. Acta Math Sci, 2013, 33B(5): 1243–1254  |