1. Proc. 8th Commission of the European Communities Conf. on Photovoltaic Solar Energy;Boes,1988
2. Tech. Dig. 3rd Int. Photovoltaic Science and Engineering Conf.;Ogasawara,1987
3. Tech. Dig. 3rd Int. Photovoltaic Science and Engineering Conf.;Goradia,1987
4. Proc. 16th IEEE Photovoltaic Specialists' Conf.;Beaumont,1982
5. Proc. 7th Commission of the European Communities Conf. on Photovoltaic Solar Energy;Beaumont,1986