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2. A. N. Alekhnovich, Characteristics and Properties of Powergenerating Coals [in Russian], Tsitsero, Chelyabinsk (2012).
3. B. S. Beloselskii and V. K. Solyakov, Power-generating Fuel [in Russian], Énergiya, Moscow (1980).
4. RF State Standard GOST 30827–2002. Solid Mineral Fuel. Definition of Abrasive Capacity (Abrasivity) [in Russian], effective date: January 01, 2004, IPK Izd. Standartov, Moscow (2003).
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