1. R. Landauer (edited by J. C. Garland and D. B. Tanner), ?Electric Transport and Optical Properties of Inhomogeneous Media?, AIP Conference Proceedings, no. 40, American Institute of Physics, (New York, 1978).
2. J. C. Maxwell, ?A Treatise on Electricity and Magnetism?, 2nd ed. Vol. 1, Clarendon Press, Oxford (1881).
3. R. E. De LaRue and C. W. Tobias,J. Electrochem. Soc. 106 (1959) 827.
4. R. E. Meredith,in ?Advances in Electrochemistry and Electrochemical Engineering?, Vol. 2 (edited by C.W. Tobias), Interscience Publishers, New York (1962) p. 15.
5. D. A. G. Bruggeman,Ann. Phys. (Lpz) 24 (1935) 636.