1. Holloway, H.: in: Physics of Thin Films, Vol. 11, Hass, G., Frankombe, M.H. (eds.), New York: Academic Press, 1980, p. 116.
2. Clemens, H., Krenn, H., Tranta, B., Ofner, P., Bauer, G.: Superlattices Microstruct. 4 (1988) 591.
3. Clemens, H., Ofner, P., Bauer, G., Hong, J.M., Chang, L.L.: Mater. Lett. 7 (1988) 127.
4. Müller, P., Fach, A., John, J., Tiwari, A., Zogg, H., Kostorz, G.: J. Appl. Phys. 79 (1996) 1911.
5. Springholz, G.: in: Lead Chalcogenides: Physics and Applications, Khokhlov, D. (ed.), New York: Taylor and Francis, 2002, p. 123.