Germicidal ultraviolet irradiation in air conditioning systems: effect on office worker health and wellbeing __ a pilot study.
Room air disinfection by ultraviolet irradiation of upper air: air mixing and germicidal effectiveness.
Ultraviolet lamps for room air disinfection: effect of sampling location and particle size of bacterial aerosol.
Outbreak of invasive Aspergillus infection in surgical patients, associated with a contaminated air-handling system.