1. Whitehurst, D.D., Mitchell, T.O., and Farcasiu, M., Coal Liquefaction, New York: Academic, 1980.
2. Chemierohstoffe aus Kohle, Falbe, J., Ed., Stuttgart: Georg Thieme, 1977.
3. Maloletnev, A.S., Krichko, A.A., and Garkusha, A.A., Poluchenie sinteticheskogo zhidkogo topliva gidrogenizatsiei uglei (Production of Synthetic Liquid Fuel by Coal Hydrogenation), Moscow: Nedra, 1992.
4. Luo, M. and Curtis, Ch.W., Fuel Process. Technol., 1996, vol. 49, p. 91.
5. Ades, H.F. and Subbaswamy, K.R., Fuel Process. Technol., 1996, vol. 49, p. 207.