1. A.F. Beardon: Iteration of Rational Functions, Springer GTM 132, (1991)
2. R. Bowen: Equilibrium States and the Ergodic Theory for Anosov Diffeomorphisms, Springer LNM 470
3. Brolin: Invariant sets under iteration of rational functions. Ark. Mat.6, 103?44
4. J.W.S. Cassels: An Introduction to Diophantine Approximation, (C.U.P., 1957)
5. M. Denker, Grillenberger, Sigmund: Ergodic Theory on Compact Spaces. Springer LNM 527