1. Brawn, F.: Papp. Ann. 153 (1974) 556.
2. Flores, F., Tejedor, C.: J. Phys. C. Solid State Phys. 20 (1987) 145.
3. Rhoderick, E.H., Williams, R.H.: Metal-Semiconductor Contact.s. Oxford: Oxford Science Public., 1988.
4. Mönch, W.: Electronic Structure of Metal-Semiconductor Contacts. Dordrecht: Kluwer, 1990.
5. Lannoo, M., Friedel, F.: Atomic and Electronic Structure of Surfaces. Theoretical Aspects. Berlin: Springer-Verlag, 1991.