Hood, Madison M., John G. Groppo, Michelle N. Johnston, James C. Hower, Herek L. Clack, Diego S. de Medeiros, Silvio R. Taffarel, Cesar M.N.L. Cutruneo, and Luis F.O. Silva. 2016. “Influence of Coal-Fired Power Plant Emissions Regulations and Consequent Engineering Controls and Coal-Supply Modifications on Fly Ash Chemistry and Petrology: Examples from Kentucky Power Plants.” Coal Combustion and Gasification Products 8 (2): 8–18. https://doi.org/10.4177/CCGP-D-15-00010.1.