1. K. B. Athreya and P. E. Ney, Branching Processes, Springer-Verlag, Berlin, 1972.
2. I. N. Baker, Iteration of entire functions: an introductory survey, Lectures on Complex Analysis 1987 (Xian), World Scientific Pub. Co., Singapore, 1988, 1–17.
3. I. N. Baker and R. N. Maalouf, Convergence of a modified iteration process, in: R. M. Ali, St. Ruscheweyh and E. B. Saff (eds.), Computational Methods and Function Theory 1994 (Penang), Ser. Approx. Decompos., 5, World Scientific Pub. Co., River Edge, NJ, 1995, 49–55.
4. I. N. Baker and Ch. Pommerenke, On the iteration of analytic functions in a halfplane II, J. London Math. Soc. (2) 20 (1979), 255–258.
5. I. N. Baker and P. J. Rippon, Convergence of infinite exponentials, Ann. Acad. Sci. Fenn. Ser. A. I. Math. 8 (1983), 179–186.