Oxygen Enhanced Combustion for NOx Control, Quarterly Technical Progress Report: October1 - December 31, 2002, report, February 1, 2003; (https://digital.library.unt.edu/ark:/67531/metadc735634/m1/1/: accessed April 17, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .