Nussbaum, N. J., Zhu, D., Kuhns, H. D., Mazzoleni, C., Chang, M., Moosmüller, H., Watson, J. G. (2009). The In-Plume Emissions Test-Stand: A novel instrument platform for the real-time characterization of combustion emissions, J Air Waste Manage Assoc, 59 (12), 1437-1445