1. Bentley, R.W., Energy Policy, 2002, vol. 30, p. 189.
2. Handbook of Air Pollution Technology, Calvert, S. and Englund, H.M., Eds., New York: John Wiley and Sons, 1984.
3. BP Statistical Review of World Energy, BP, 2021.
4. Kuznichenkov, Yu.N., GAZinform, 2011, no. 1/32, p. 3.
5. Solar, C., Nat. Gas, 2010, p. 205.