1. Archer, D. H., Vidt, E. J., Keairns, D. L., Morris, J. P. and Chem. J. L. P., “Coal Gasification for Clean Power Production,” Proceedings of the Third International Conference on Fluidized Bed Combustion, Hueston Woods, Ohio, 1972, issued as EPA 650/2-73-053, December, 1973, NTIS No. PB 231977.
2. Godel, A. A., Revue Générate de Thermique, 1966, pp. 5, 349-359.