1. Functional forms of nitrogen in coals and coal volatiles in relation to NOx formation;Kelly,1991
2. Nitrogen functionality in carbons and its release as NOx during gasification;Spracklin,1991
3. Nitrogen functionality in coals and coal chars;Wójtowicz,1992
4. Functional forms of nitrogen in coals and the release of coal nitrogen as NOx precursors (HCN and NH3);Nelson,1992
5. Combustion of coal as a source of N2O emission;Wójtowicz;Fuel Processing Technol.,1993