1. J. Milnor, Dynamics in one complex variable, 3rd ed., Annals of Mathematics Studies, vol. 160, Princeton University Press, Princeton, NJ, 2006.
2. A. F. Beardon and D. Minda, The hyperbolic metric and geometric function theory, Quasiconformal mappings and their applications, Narosa, New Delhi, 2007.
3. W. Bergweiler, Iteration of quasiregular mappings, Comput. Methods Funct. Theory 10 (2010), 455–481.
4. W. Bergweiler, Fatou–Julia theory for non-uniformly quasiregular maps, Ergodic Theory Dynam. Systems 33 (2013), 1–23.
5. B. Bielefeld, S. Sutherland, F. Tangerman and J. J. P. Veerman, Dynamics of certain nonconformal degree-two maps of the plane, Experiment. Math. 2 (1993), no. 4, 281–300.