1. K.A. Bertness, S.R. Kurtz, D.J. Friedman, A.E. Kibbler, C. Krammer, J.M. Olson, Proceedings of the First World Conference on Photovoltaic Energy Conversion, IEEE, New York, 1994, pp. 1671–1678.
2. P.R. Sharps, M.L. Timmons, Y.C.M. Yeh, C.L. Chu, Proceedings of the First World Conference on Photovoltaic Energy Conversion, IEEE, New York, 1994, pp. 1725–1728.
3. Over 30% efficient InGaP/GaAs tandem solar cells
4. Over 27% efficiency GaAs/InGaAs mechanically stacked solar cell
5. T. Takamoto, E. Ikeda, T. Agui, H. Kurita, T. Tanabe, S. Tanaka, H. Matsubara, Y. Mine, S. Takagishi, M. Yamaguchi, Proceedings of the 26th IEEE Photovoltaic Specialists Conference, IEEE, New York, 1997, pp. 1031–1034.