1. A.D. Little, in Proc. 16th Europ. Photovolt. Solar Energy Conf., ed. by H. Scheer, B. McNelis, W. Palz, H.A. Ossenbrink, P. Helm (James & James, London, 2000), p. 9
2. A. Endrös, D. Franke, Ch. Häßler, J. Kaleis, W. Koch, H.J. Möller, Handbook of Photovoltaic Engineering (Wiley-VCH, Weinheim, 2002), p. 634
3. H. Lautenschlager, F. Lutz, C. Schetter, U. Schubert, R. Schindler, in Proc. 14th Europ. Photovolt. Solar Energy Conference (Stephens & Associates, Bedford, 1997), p. 1358
4. J.M. Gee, R.R. King, K.W. Mitchell, in Proc. IEEE 25th Photovolt. Specialist Conference, ed. by P. Basore (IEEE, New York, 1996), p. 409
5. O. Schultz, S.W. Glunz, G. Willeke, A. Leimenstoll, H. Lautenschlager, J.C. Goldschmidt, in Proc. 19th Europ. Photovolt. Solar Energy Conference (Stephens & Associates, Bedford, 2004), p. 817