1. D. Stauffer, Phys. Repts. 54, 1 (1979); D. Stauffer, Introduction to Percolation Theory (Francis and Taylor, 1985).
2. P. G. de Gennes, Scaling Concepts in Polymer Physics (Cornell U Press, Ithaca NY, 1979).
3. P. J. Flory, Principles of Polymer Chemistry (Cornell U Press, Ithaca NY, 1953).
4. J. D. Ferry, Viscoelastic Properties of Polymers (Wiley, 1980).
5. For polydisperse systems such as percolation, different dynamical exponents result from measuring different physical quantities (see Ref. 1).