1. K. Fuchs, Proc. Camb. Phil. Soc. 1938, 34, 100.
2. E.H. Sondheimer, Ad. Phys. 1952, 1, 1.
3. L.I. Maissel, Handbook of Thin Film Technology, edited by L.I. Maissel and R. Glang (Mc Graw Hill, New York) 1970, Chapter 13, 1.
4. J.M. Ziman, Electrons and Phonons (Clarendon Press, Oxford) 1960, 267.
5. D.S. Campbell, The Use of Thin Films in Physical Investigations (Academic Press, New York) 1966, p. 299.