Air-Treatment Systems for Controlling Hospital-Acquired Infections. Kowalski, W.J., (2007) HPAC Engineering. vol. 79, No. 1, p28-47 (pdf download, viewable only).   Mathematical Modeling of UVGI for Air Disinfection. Kowalski, W.J., Bahnfleth, W.P., Witham, D.L., Severin, B.F., Whittam, T.S. (2000). Quantitative Microbiology 2, p249-270. (pdf download).   Airborne Respiratory Diseases and Mechanical Systems for Control of Microbes by W. J. Kowalski and William Bahnfleth, HPAC Engineering, July 1998, v70n7, pp34-48.   Filtration of Airborne Microorganisms: Modeling and Prediction by W. J. Kowalski, William Bahnfleth, and T. S. Whittam, ASHRAE Transactions: Research 1999, v105n2, pp4-17.   UVGI Design Basics for Air and Surface Disinfection by W. J. Kowalski and William Bahnfleth, HPAC Engineering, January 2000, v72n1, pp100-110.   Effective UV Germicidal Irradiation System Design Through Improved Modeling by W. J. Kowalski and William Bahnfleth, ASHRAE Transactions: Research 2000, v106pt2.   Airborne-Microbe Filtration in Indoor Environments by W. J. Kowalski and W. P. Bahnfleth, HPAC Engineering, 2002, v74(1), pp57-69.   MERV Filter Models for Aerobiological Applications by W. J. Kowalski and William Bahnfleth, Air Media, Summer 2002, p13-17.   Immune Building Technology and Bioterrorism Defense by W. J. Kowalski and W. P. Bahnfleth, HPAC Engineering, January 2003, v75(1), pp57-62.   Modeling Immune Building Systems for Bioterrorism Defense by W. J. Kowalski, W. P. Bahnfleth, and A. Musser, Journal of Architectural Engineering, June 2003, v9(2), pp222-227.   Dimensional Analysis of UVGI Air Disinfection Systems by W. J. Kowalski, W. P. Bahnfleth, and J. Rosenberger, International Journal of HVAC&R Research, July 2003, v9(3), pp347-363.   Proposed Standards and Guidelines for UVGI Air Disinfection by W. J. Kowalski, W. P. Bahnfleth, IUVA News, v6(1), pp20-25.   Engineering Control of Airborne Disease Transmission in Animal Laboratories by W. J. Kowalski, William Bahnfleth, and Donna Carey, Contemporary Topics in Laboratory Animal Science 2002, v41p9-17.   Demonstration of a Hermetic Airborne Ozone Disinfection System: Studies on E. coli by W. J. Kowalski, W. P. Bahnfleth, B.A. Striebig, and T.S. Whittam, AIHA Journal, March/April 2003, v64(2), pp222-227.