1. Solar Cell Efficiency Tables (Version 20)
2. A. Ennaoui, C.D. Lochande, M. Weber, R. Scheer, H.J. Lewerence, Proceedings of the 14th European Photovoltaic Solar Energy Conference, Barcelona, Spain, H.S. Stephens and Associates, UK, 1997, p. 1220.
3. Large area ZnO films optimized for graded band-gap Cu(InGa)Se2-based thin-film mini-modules
4. T. Nakada, K. Furumi, M. Mizutani, Y. Hagiwara, A. Kunioka, 11th International Photovoltaic Science and Engineering Conference, Hokkaido, Japan, Technical Digest, 1999, p. 81.
5. A. Ennaoui, M. Lux-Steiner, F. Karg, 11th International Photovoltaic Science and Engineering Conference, Hokkaido, Japan, Technical Digest, 1999, p. 79.