1. Wever, H.: Elektro- und Thermotransport in Metallen, Leipzig: Joh. Ambrosius Barth 1973
2. Huntington, H.B.: In: Diffusion in solids. Nowick, A.S., Burton, J.J. (eds.). New York: Academic Press 1975
3. For a recent discussion see Verbruggen, A.H.: IBM J. Res. Dev.32, 93 (1988)
4. For a review see Wipf, H.: In: Hydrogen in metals II. Alefeld, G., Völkl, J. (eds.). Berlin, Heidelberg, New York: Springer 1978
5. Alefeld, G.: Phys. Status Solidi32, 67 (1969)