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2. F.J. Perzak, C.D. Litton, K.E. Mura, C.P. Lazzara, Hazards of Conveyor Belt Fires, Bureau of Mines Report of Investigations 9570, 1995, 33 p.
3. S.J. Luzik, L.A. Desautels, Coal Mine Fires Involving Track and Belt Entries 1970–1988, Bureau of Mines Report of Investigations 9380, 1990, 23 pp.
4. U.S. Department of Labor, Mine Safety and Health Administration, Report of Investigations, 46-08801, 2007.
5. C.D. Litton, M. DeRosa, J.S. Li, Calculating Fire-Throttling of Mine Ventilation Airflow, Bureau of Mines Report of Investigations 9076, 1987, 21 p.