1. D.E. Brodie, R. Singh, J.H. Morgan, J.D. Leslie, C.J. Moore, A.E. Dixon, in Proc. 14th Photovoltaic Specialists Conference, San Diego, CA, 1998, p. 468
2. D. Goyal, P. Solanaki, B. Marathe, M. Takwale, V. Bhide, Jpn. J. Appl. Phys. 31, 361 (1992)
3. M.J. Vellekoop, A. Venema, C.C.G. Visser, P.M. Sarro, Cream. Bull. 69, 1503 (1990)
4. F.C.M. Van, D. Pol, Cream. Bull. 69, 1959 (1990)
5. K.L. Chopra, S. Major, D.K. Pandya, Thin Solid Films 102, 1 (1983)