1. S.M. Sze:Physics of Semiconductor Devices, 2nd edn. (Wiley, New York 1981) p. 87
2. H.K. Henisch:Semiconductor Contacts (Clarendon, Oxford 1984) Chap. 3; and Ref. [1], Chap. 5
3. E.H. Rhoderick:Metal Semiconductor Contacts (Clarendon, Oxford 1978) p. 39, 88
4. H.C. Card, E.H. Rhoderick: J. Phys. D4, 1589 (1971)
5. J.H. Werner, K. Ploog, H.J. Queisser: Phys. Rev. Lett.57, 1080 (1986)