1. V. L. Dalal, A. R. Moore, J. Appl. Phys., 48s, 1244, (1977)
2. B. L. Sater, C. Goradia, Proceedings 11th Photovoltaic Specialists Conference, Phoenix, (1975), p. 356
3. D. G. Schueler, J. G. Fossum, E. L. Burgess, F. L. Vook, Proceedings 11th Photovoltaic Conference, Phoenix, (1975), p. 327
4. J. G. Fossum, E. L. Burgess, Proceedings 12th IEEE Photovoltaic Specialists conference - Bâton Rouge, (1976), p. 737
5. J. A. Castle, Proceedings 12th IEEE Photovoltaic Specialists conference - Bâton Rouge, (1976), p. 751