1. The degradation of semiconductor light-emitting diodes, high-radiance lamps and lasers
2. Proc. 13th Photovoltaic Specialists' Conf.;Weizer,1978
3. Proc. Conf. on Defects and Radiation Effects in Semiconductors, Nice, 1978,1978
4. Proc. 11th Photovoltaic Specialists' Conf.;Rahilly,1975
5. Proc. 10th Photovoltaic Specialists' Conf.;Meulenberg,1974