1. S. Pizzini:Solar Energy Mater., 1982, vol. 6, pp. 252–97.
2. S. Pizzini: Proc. Symp. on Materials and New Processing Technologies for Photovoltaics,Electrochem. Soc, 1982, vols. 82-8, pp. 26-44.
3. J. Dietl: Status Report of Energy Research and Energy Technology on Photovoztaics, KFA, Jülich, 1987, pp. 23-40.
4. A. Muan and E.F. Osborn:Phase Equilibria among Oxides in Steelmaking, Addison-Wesley, Reading, MA, 1965.
5. Schlackenatlas Slag Atlas, Verlag Stahleisen, Düsseldorf, 1981.