1. J. -M. Réau, J. Claverie, G. Campet, C. Deportes, D. Ravaine, J. -L. Souquet and A. Hammou, C. R. Acad. Sci. (Paris) 280 (1975) 325.
2. A. K. Jonscher, Phys Stat. Solidi (a) 32 (1975) 665.
3. , J. Mater. Sci., 13 (1978) 553.
4. , Thin Solid Films, 36 (1976) 1.
5. A. K. Jonscher and R. M. Hill, ?Physics of Thin Films?, edited by M. H. Francombe, Vol. 8 (Academic Press, 1975) p. 169.