1. K. Machida, 21st PV System Symposium Organized by JPEA, Tokyo, Japan, 2004, pp. 1–21 (in Japanese).
2. J.D. Levine, G.B. Hotchkiss, M.D. Hammerbacher, Proceedings of the 22nd IEEE-PVSC, Las Vegas, USA, 1991, pp. 1045–1048.
3. R. Bisconti, H.A. Ossenbrink, 14th European-PVSEC, Barcelona, Spain, 1997, pp. 207–210.
4. T. Warabisako, T. Uematsu, Y. Yazawa, H. Ohtsuka, S. Muramatsu, K. Tsutsui, J. Minemura, Y. Miyamura, second PVSEC, Vienna, Austria, 1998, pp. 1226–1231.
5. T. Uematsu, T. Warabisako, Y. Yazawa, H. Ohtsuka, S. Muramatsu, K. Tsutsui, J. Minemura, Y.Miyamura, second PVSEC, Vienna, Austria, 1998, pp. 1570–1573.