Tulve, N., A. Stefaniak, M. Vance, K. Rogers, S. Mwilu, R. LeBouf, D. Schwegler-Berry, R. Willis, T. Thomas, AND L. Marr. Characterization of silver nanoparticles in selected consumer products and its relevance for predicting children's potential exposures. INTERNATIONAL JOURNAL OF HYGIENE AND ENVIRONMENTAL HEALTH. Urban & Fischer Verlag Jena, Jena, Germany, 218(3):345-357, (2015).

Byeon, S., R. Willis, AND T. Peters. Chemical Characterization of Outdoor and Subway Fine (PM2.5-1.0) and Coarse (PM10-2.5) Particulate Matter in Seoul (Korea) Computer-Controlled Scanning Electron Microscopy (CCSEM). International Journal of Environmental Research and Public Health. Molecular Diversity Preservation International, Basel, Switzerland, 12(2):2090--2104, (2015).

Sawvela, E., R. Willis, R. West, G. Casuccio, G. Norris, N. Kumar, D. Hammond, AND T. Peters. Passive Sampling to Capture the Spatial Variability of Coarse Particles by Composition in Cleveland, OH. ATMOSPHERIC ENVIRONMENT. Elsevier Science Ltd, New York, NY, 105:61-69, (2015).

Vance, M., N. Tulve, R. Willis, K. Rogers, T. Thomas, AND L. Marr. Quantifying the Release of Silver from Nanotechnology-Based Consumer Products for Children. QEEN Workshop, Arlington, VA, July 07 - 08, 2015.

Conny, J., R. Willis, D. Ortiz, AND A. Colton. Electron Microscopy Characterization of Aerosols Collected at Mauna Loa Observatory During Asian Dust Storm Event. Presented at Dust 2014 International Conference on Atmospheric Dust, Castellaneta Marina, ITALY, June 01 - 06, 2014.

Willis, R., L. Cernikovsky, T. Conner, J. Novak, H. Placa, B. Krejei, I. Nikolova, E. Chalupniekova, AND R. Williams. Identifying the Sources Contributing to PM Exceedances in Ostrava, Czech Republic, Using Passive Aerosol Sampling Coupled with Computer-Controlled Microscopy. Presented at Dust 2014 International Conference on Atmospheric Dust, Castellaneta Marina, ITALY, June 01 - 06, 2014.

Gantt, B., S. Hoque, R. Willis, K. Fahey, J. Delgado-Saborit, R. Harrison, G. Erdakos, P. Bhave, M. Zhang, H. Pye, AND K. Kovalcik. Near-Road Modeling and Measurement of Particles Generated by Nanoparticle Diesel Fuel Additive Use. AAAR 33rd Annual Conference, Orlanda, FL, October 23, 2014.

Gantt, B., S. Hoque, R. Willis, K. Fahey, J. Degado-Saborit, R. Harrison, G. Erdakos, P. Bhave, K. Zhang, K. Kovalcik, AND H. Pye. Near-road modeling and measurement of cerium-containing particles generated by nanoparticle diesel fuel additive use. ENVIRONMENTAL SCIENCE AND TECHNOLOGY. John Wiley & Sons, Ltd., Indianapolis, IN, 48(18):19697-10613, (2014).

Conny, J., R. Willis, J. Weinstein, Todd Krantz, AND C. King. Particulate Emissions from the Combustion of Diesel Fuel with a Fuel-Borne Nanoparticulate Cerium Catalyst. Presented at Fall 2013 american Geophysical Union Meeting, San Francisco, CA, December 07 - 11, 2013.

Tulve, N., K. Rogers, R. Willis, M. Quadros, AND T. Thomas. Potential exposure to silver nanoparticles in children's consumer products. Presented at ISES Meeting, Basel, SWITZERLAND, August 22, 2013.

Quadros, M., R. Pierson, N. Tulve, R. Willis, K. Rogers, T. Thomas, AND L. Marr. Release of silver from nanotechnology-based consumer products for children. ENVIRONMENTAL SCIENCE AND TECHNOLOGY. John Wiley & Sons, Ltd., Indianapolis, IN, 47(15):8894-8901, (2013).

Cernikovsky, L., J. Novak, H. Placa, B. Krejci, I. Nikolova, E. Chalupnickova, T. Conner, G. Norris, K. Kovalcik, D. Olson, J. Turlington, C. Croghan, R. Willis, AND R. Williams. The Impact of Select Pollutant Sources on Air Quality and the Moravian-Silesian Metropolitan Region by the Positive Matrix Factorization Model. Presented at 2013 European Aerosol Conference, Prague, CZECH REPUBLIC, September 01 - 06, 2013.