1. L. Stolt, M. Bodegard, J. Kessler, M. Ruckh, K.O. Velthaus and H.W. Schock, Proc. 11th European Photovoltaic Solar Energy Conference, Montreux, Harwood Academic, Chur, Switzerland, 1993, p. 120.
2. V. Alberts and R. Swanepoel, Proc. of the 13th European Photovoltaic Solar Energy Conference, Nice, H.S. Stephens, Bedford, UK, 1996, p. 1933.
3. B.M. Basol and V.K. Kapur, Mater. Res. Soc. Symp. Proc., 327 (1994) 71.
4. M.L. Fearheiley, Solar Cells, 16 (1986) 91.
5. J.R. Tuttle, M. Ruth, D. Albin, A. Mason and R. Noufi, Proc. 20th IEEE Photovoltaic Specialists Conference, Las Vegas, AZ, IEEE, New York, 1988, p. 1525.