1. Delyagin, G.N., Kagan, Ya.M., and Kondrat’ev, A.S., Ross. Khim. Zh., 1994, no. 3, p. 22.
2. Makarov, A.S. and Savitskii, D.P., Ugol’, 2009, no. 7, p. 42.
3. Khodakov, G.S., Energetika, 2000, no. 2, p. 104.
4. Raffi, M.T., Jamel, F.A., Don-Jing, S., and Lewis, E.W., Fuel, 2002, vol. 81, no. 16, p. 2019.
5. Agroskin, A.A., Khimiya i tekhnologiya uglya (Coal Chemistry and Technology), Moscow: Nedra, 1969.