1. Proc. 12th Eur. Photovoltaic Sol. Energy Conf.;Bloss,1994
2. Proc. 2nd World Conf. of Photovoltaic Sol. Energy Conv.;Fuhs,1998
3. Proc. 12th Eur. Photovoltaic Sol. Energy Conf.;Gay,1994
4. Proc. 1994 IEEE 1st World Conf. Photovoltaic Energy Conv., Hawaii;Bloss,1994