1. Bituminous Coal Research , Inc. ( 1965 ). Gas generator research and development . Report L-156 prepared for the Office of Coal Research , U.S. Department of the Interior, Vol. 2 , pp. 99 – 216 .
2. Coward , H. F. , and Jones , G. W. ( 1952 ). Limits of flammability of gases and vapors . U.S. Bureau of Mines Bulletin No. 503 , pp. 5 – 10 .
3. Crouch , W. B. , and Klapatch , R. D. ( 1976 ). Solids gasification for gas turbine fuel, 100 and 300 Btu gas. Presented at the Eleventh Intersociety Energy Conversion Conference , Lake Tahoe, Nevada , September 16 .