1. and , Proc. 19th IEEE Photovoltaic Specialists Conf., New Orleans, IEEE, New York 1987 (p. 931).
2. Polycrystalline silicon thin-film solar cells: The future for photovoltaics?
3. , , , , , , , and , Proc. 12th Europ. Photovoltaic Solar Energy Conf., Amsterdam, Ed. R. Hill, W. Palz, and P. Helm, H. S. Stephens, Bedford 1994 (p. 1823).