1. Tech. Dig. 1st Int. Photovoltaic Science and Engineering Conf.;Kuwano,1984
2. MRS Fall Meeting;Matsuyama,1989
3. MRS Spring Meeting;Hishikawa,1993
4. Tech. Dig. 3rd Int. Photovoltaic Science and Engineering Conf.;Nath,1987
5. Proc. 20th IEEE Photovoltaic Specialists Conf.;Hoffman,1988