1. Clarke, L. B. (1993), IEA Coal Research Report # IEACR/62.
2. Bove, H. J., Brodsky, I. S., Nuyt, G. M., and Angelini, E. J. (1995),Power.June, 33–36.
3. Harben, P. (1991),Industrial Minerals,July 1, 47–49.
4. Illinois Clean Coal Institute (1994),Request for Proposals for Research on Utilization and Marketing of Illinois Basin Coal.
5. Gray, S. M., Puski, S. M., Richard, R., McClellan, T., and Murphy, J. L. (1995),Results of high efficiency S02 removal testing at PSI Energy’s Gibson station in 1995 S02 Control Symposium. Electric Power Research Institute, Miami, FL.