1. Hughes, B. D. Random Walks and Random Environments (Clarendon, Oxford, 1995).
2. Weiss, G. H. Aspects and Applications of the Random Walk (North-Holland, Amsterdam, 1994).
3. Shlesinger, M. F. in Encyclopedia of Applied Physics Vol. 16, 45–70 (VCH, Berlin, 1996).
4. Klafter, J. et al. Phys. Today 49, 33–39 (1996).