1. International lighting vocabulary;CIE,1987
2. Guidelines for the application of upper-room ultraviolet germicidal irradiation for preventing transmission of airborne contagion—part II: design and operation guidance;First;ASHRAE Transactions,1999
3. UV purification – application information;Philips,2005
4. Ultraviolet air disinfection;CIE,2003
5. ARTI. Defining the effectiveness of UV lamps installed in circulating air ductwork; 2002.