1. Ablowitz, M.J., Halburd, R., Herbst, B.: On the extension of the Painlevé property to difference equations. Nonlinearity 13, 889–905 (2000)
2. London Mathematical Society Lecture Note Series;M.J. Ablowitz,1991
3. Bergweiler, W., Hayman, W.K.: Zeros of solutions of a functional equation. Comput. Methods Funct. Theory 3(1–2), 55–78 (2003)
4. Bergweiler, W., Ishizaki, K., Yanagihara, N.: Meromorphic solutions of some functional equations. Methods Appl. Anal. 5(3), 248–258 (1998)
5. Bergweiler, W., Ishizaki, K., Yanagihara, N.: Growth of meromorphic solutions of some functional equations, I. Aequ. Math. 63, 140–151 (2002)