1. Solar Cells (Prentice-Hall, 1982).
2. et al., Proc. 18th IEEE Photovoltaic Specialists Conference, Las Vegas, Nevada, 1985, pp. 552–555.
3. patent US4667059, 1987.
4. et al., Proc. 20th European Photovoltaic Solar Energy Conference, Barcelona, 2005, to be published.
5. et al., Proc. 19th European Photovoltaic Solar Energy Conference, Paris, 2004, pp. 3610–3613.