@inproceedings { hofkovste1996, author = "Hofmann, D. M. and Kovalev, D. and Steude, G. and Volm, D. and Meyer, B. K. and Xavier, C. and Monteiro, T. and Pereira, E. and Mokov, E. N. and Amano, H. and Akasaki, I.", title = "2.2 eV luminescence in GaN", year = "1996" }