1. A.M. Barnett, J.A. Bragagnolo, R.B. Hall, J.E. Phillips, and J.D. Meakin, Conf. Rec. 13th IEEE Photov. Spec. Conf., Washington, D.C., 1978 (IEEE, New York, 1978), p. 419.
2. W. Arndt, G. Bilger, W.H. Bloss, G.H. Hewig, F. Pfisterer, and H.W. Schock, Proc. 1st E.C. Photov. Solar Energy Conf., Luxemburg, 1977, (D. Reidel Publ. Comp., Dordrecht, 1977), p. 547.
3. W.H. Bloss and G.H. Hewig, Conf. Rec. 14th IEEE Photov. Spec. Conf., San Diego, 1980 (IEEE New York, 1980), p. 287.
4. W. Arndt, G. Bilger, G.H. Hewig, F. Pfisterer, H.W. Schock, J. Woerner, and W.H. Bloss, Proc. 2nd E.C. Photov. Solar Energy Conf. Berlin 1979, (D. Reidel Publ. Comp., Dordrecht, 1979), p. 826.
5. F. Seel, Grundlagen der analytischen Chemie, Verlag Chemie, Weinheim 1955.