Apte, Michael G., Lara A. Gundel, Brett C. Singer, Douglas P. Sullivan, and Richard G. Sextro."Indoor Transport of ETS Particles And Tracers."Proceedings of the Indoor Air '99 Conference, Edinburgh, Scotland 2 (1999) 965-970.
Sippola, Mark R., William W. Nazaroff, and Tracy L. Thatcher."Particle deposition from turbulent duct flow."Proceedings of the Indoor Air '99, Edinburgh, Scotland 2 (1999) 24-29.


Ross, Marc, Rob Goodwin, Rick Watkins, Thomas P. Wenzel, and Michael Q. Wang."Real-World Emissions from Conventional Passenger Cars."Journal of the Air & Waste Management Association 48.6 (1998) 502 - 515. DOI
Gadgil, Ashok J.."Drinking Water in Developing Countries."Annual Review of Energy and the Environment 23.1 (1998) 253 - 286. DOI