1. Widmer, H., Gunther-Mohr, G.R.: Helv. Phys. Acta 34 (1961) 635.
2. McVay, G.L., DuCharme, A.R.: J. Appl. Phys. 44 (1973) 1409.
3. McVay, G.L., DuCharme, A.R.: Phys. Rev. B 9 (1974) 627.
4. McVay, G.L., DuCharme, A.R.: Inst. Phys. Conf. Ser. 23 (1975) 91.
5. Bean, J.C., Fiory, A.T., Hull, R., Lynch, R.T.: Proc. 1st Int. Symp. on Si MBE, Bean, J.C. (ed.), Pennington NJ: The Electrochem. Soc., 1985, p. 385.