1. O. N. Fedyaeva and Yu. F. Patrakov, Khimiya Tverdogo Topliva, No. 5, 24–30 (2004).
2. P. C. Painter, M. Sobkowiak, and J. Youtcheff, Fuel, 66, No. 7, 973–978 (1987).
3. C. Chen, J. Gao, and Y. Yan, Energy & Fuels, 12, No. 3, 446–449 (1998).
4. I. V. Eremin and T. M. Bronovets, Khimiya Tverdogo Topliva, No. 2, 3–12 (1997).
5. J. Schuyer and D. W. Van Krevelen, Fuel, 33, No. 2, 176–183 (1954).