Banerjee, A., Trueblood, M. B., Zhang, X., Manda, K. R., Lobo, P., Whitefield, P. D., Hagen, D. E., and Ercal, N., “N-acetylcysteineamide (NACA) prevents inflammation and oxidative stress in animals exposed to diesel exhaust particles”, Toxicology Letters (2009), Vol. 187, No. 3, 187-193.

Hagen, D.E., Lobo, P., Whitefield, P.D., Trueblood, M.B., Alofs, D.J ., and Schmid, O., “Performance Evaluation for a Fast Mobility-Based Particle Spectrometer for Aircraft Exhaust Particles”, Journal of Propulsion and Power (2009), Vol. 25, No. 3, 628-634.

Scott C. Herndon, John T. Jayne, Prem Lobo, Tim Onasch, Gregg Fleming, Donald E. Hagen, Philip D. Whitefield, and Richard C. Miake-Lye, “Commercial Aircraft Engine Emissions Characterization of in-Use Aircraft at Hartsfield-Jackson Atlanta International Airport”, Environmental Science and Technology (2008), Vol. 42, 1877-1883

Whitefield, P.D., P. Lobo, and D.E. Hagen, 2007: PM Emissions from Advected Aircraft Plumes at the Oakland International Airport. In Sausen, R., A. Blum, D.S. Lee and C. Brüning (eds.): Proceedings of an International Conference on Transport, Atmosphere and Climate (TAC). Luxembourg, Office for Official Publications of the European Communities, ISBN 92-79-04583-0, 95-100.

Hagen, D.E., P. Lobo, and P.D. Whitefield, 2007: Physical Characterization of PM Emissions from In-Service Commercial Gas Turbine Engines – Projects APEX and JETS APEX2. In Sausen, R., A. Blum, D.S. Lee and C. Brüning (eds.): Proceedings of an International Conference on Transport, Atmosphere and Climate (TAC). Luxembourg, Office for Official Publications of the European Communities, ISBN 92-79-04583-0, 247-251.

Chowen C. Wey; Bruce A. Anderson; Changlie Wey; Richard C. Miake-Lye; Philip Whitefield; Robert Howard, “Overview on the Aircraft Particle Emissions eXperiment (APEX)”, Journal of Propulsion and Power (2007), Vol. 23,  No. 5, 898-905

Prem Lobo; Donald E. Hagen; Philip D. Whitefield; Darryl J. Alofs, “Physical Characterization of Aerosol Emissions from a Commercial Gas Turbine Engine”, Journal of Propulsion and Power (2007), Vol. 23, No. 5, 919-929

K D. Brundish; A R. Clague; C W. Wilson; R C. Miake-Lye; R C. Brown; J Wormhoudt; S P. Lukachko; A T. Chobot; C K. Yam; I A. Waitz; D E. Hagen; O Schmid; P D. Whitefield, “Evolution of Carbonaceous Aerosol and Aerosol Precursor Emissions Through a Jet Engine”, Journal of Propulsion and Power (2007), Vol. 23,  No. 5, 959-970

Schmid, O., E. Karg, D. Hagen, P. Whitefield, and G. Ferron, “On the effective density of non-spherical particles as derived from combined measurements of aerodynamic and mobility equivalent size”, J. Aerosol Sci. (2007), Vol. 38, 431-443.

P. Whitefield, D. Hagen and P. Lobo, “ PM Gas Turbine Emission Measurements from Field Studies using the UMR Approach – APEX and “The Airport Study” ”, AIAA 3rd International Energy Conversion Engineering Conference, San Francisco, CA, August 15, 2005 [AIAA-2005-5528]

Janakiraman, A.; Issac, K.; Whitefield, P.; Hagen, D., “A numerical thermophoretic model for nanoparticle deposition in an aerosol sampling probe”, 17^th AIAA Computational Fluid Dynamics Conference, Toronto, Canada, June 2005 [AIAA 2005-5351]

Schmid, O., Hagen, D.E., Whitefield, P.D., Trueblood, M.B., Rutter, A.P., Lilenfeld, H.V., “Methodology for Particle Characterization in the Exhaust Flows of Gas Turbine Engines”, Aerosol Sci. Technol. (2004), Vol. 38, 2004, 1108-1122

Schmid, O.; Trueblood, M.B.; Gregg, N.; Hagen, D.E.; Whitefield, P.D., "Sizing of aerosol in gases other than air using a differential mobility analyzer", Aerosol Sci. Technol., Vol.36, 2002, 351-360.

Schmid, O.; Eimer, B.; Hagen, D.E.; Whitefield, P.D., "Investigation of volatility method for measuring aqueous sulfuric acid on mixed aerosols", Aerosol Sci. Technol., Vol. 36, 2002, 877-889.

Paladino, J. D.; Hagen, D. E.; Whitefield, P. D.; Hopkins, A. R.; Schmid, O.; Wilson, M. R.; Schlager, H.; Schulte, P. (2000), “Observations of particulates within the North Atlantic Flight Corridor: POLINAT 2, September-October 1997”, J. Geophys. Res., Vol. 105, 3719-3726

Hagen, D., Whitefield, P., Paladino, J., Schmid, O., Schlager, H. and Schulte, P., "Atmospheric aerosol measurements in the North Atlantic flight corridor during project POLINAT-2", J. Aerosol Sci., Vol. 30, 1999, 161-162.

Paladino, J., Whitefield, P., Hagen, D., Hopkins, A., and Trueblood, M.,“Particle concentration characterization for jet engine emissions under cruise conditions” Geophys. Res. Letts., Vol. 25,1998, 1697-1700

Hagen, D., Whitefield, P., Paladino, J., Trueblood, M. and Lilenfeld, H., "Particulate sizing and emission indices for a jet engine exhaust sampled at cruise", Geophys. Res. Letts., Vol. 25,1998, 1681-1684

Hagen, D.E., Paladino, J., Whitefield, P.D., Trueblood, M.B., and Lilenfeld, H.V., "Airborne and ground based jet engine aerosol emissions sampling during two NASA field projects: SUCCESS and SNIF", J. Aerosol Sci., Vol. 28, 1997, S67-S68.

Hagen, D.E., and Whitefield, P.D., "Particulate emissions in the exhaust plume from commercial jet aircraft under cruise conditions", J. Geophys. Res. Atmos., Vol. 101, 1996, 19551-19557

Hagen, D.E., Trueblood, M.B., and White, D.R., "Hydration Properties of Combustion Aerosols", Aerosol Sci. Technol., Vol. 10, 1989, 63-69.