1. A. R. Blythe, in ?Electrical Properties of Polymers? (Cambridge University Press, Cambridge, 1979) p. 128
2. R. D. Sherman, L. M. Middleman andS. M. Jacobs,Polym. Engng Sci. 23 (1983) 36.
3. M. Narkis, A. Ram andF. Flashner,Polym. Engng Sci. 18 (1978) 649.
4. H. Ottavi, J. Clerc, G. Giraud, J. Roussenq, E. Guyon andC. D. Mitescu, in ?Electrical Transport and Optical Properties in Inhomogeneous Media,? Ohio State, 1977, edited byJ. C. Garland andD. B. Tanner (American Institute of Physics, Columbus, 1978) p. 372.
5. S. Aharoni.J. Appl. Phys. 43 (1972) 2463.