1. For first observations of quantum dots see e. g.: Efros, Al.L., Efros A.L.: Sov. Phys. Semicond. 16, 772 (1982); Brus, L., IEEE QE-22, 1909 (1986)
2. Uhrig, A., Oberhauser, D., Dörnfeld, C., Klingshirn, C., Neuroth, N.: SPIE Proc. 1127, 101 (1989)
3. Uhrig, A., Banyai, L., Hu, Y.Z., Koch, S.W., Klingshirn, C., Neuroth, N.: Z. Phys. B-Condensed Matter 81, 385 (1990)
4. Horan, P., Blau, W.: Phase transitions, Vol. 24-26. p. 605. Gordon and Breach Science Publishers (1990)
5. Klingshirn, C.: Advances in solid state physics. Vol. 30, 335 (1990)