European Committee for Standardization, Central Secretariat. 1997. Murray, I.J., S. Plainis, K. Chauhan and W.N. Charman. The impact of lighting. The Lighting Journal . Nakamura, Shuji. 1998.
Blue lasers meet tough commercial requirements.
Photonics Spectra . May 1998, p. 130-135. Retting, Richard A., Robert G. Ulmer, and Allan F. Williams. Prevalence and characteristics of red light running crashes in the United States . Lighting Research Center , Rensselaer Polytechnic Institute , and Pacific Gas and Electric Company .