1. R. Landauer, in: J.C. Garland, D.B. Tanner (Eds.), Electrical Transport and Optical Properties of Inhomogeneous Media, AIP Conf. Proc. No. 40, New York, 1978.
2. D.J. Bergman, D. Stroud, in: H. Ehrenreich, D. Turnbull (Eds.), Solid State Physics, vol. 46, Academic, New York, 1992, p. 148.
3. See the articles in Proc. 3rd Int. Conf. on Electrical Transport and Optical Properties in Inhomogeneous Media; Phys. A 207 (1994) 1.
4. K.K. Bardhan, B.K. Chakrabarti, A. Hansen (Eds.), Breakdown and Nonlinearity in Soft Condensed Matter, Lecture Notes in Physics, Springer, New York, 1994.
5. See, for example, D. Ricard, Physica A 157 (1989) 301, and references therein.