1. Gosudarstvennyi balans zapasov polzenykh iskopaemykh na 1 yanvarya 2016 goda, Vyp. 91. Ugol’ (The State Balance of the Mineral Resources by January 1, 2016, No. 91: Coal), Chestneishin, M.V., Ed., Moscow: Rosgeolfond, 2016.
2. Eremin, I.V. and Bronovets, T.M., Marochnyi sostav uglei i ikh ratsional’noe ispol’zovanie: spravochnik (Grade Composition of Coal and Their Rational Use: Handbook), Moscow: Nedra, 1995.
3. Ivanov, V.P. and Okhotnikov, K.V., Technological gradation of coal in reserves, Razved. Okhr. Nedr., 2017, no. 6, pp. 42–48.
4. Ivanov, V.P. and Okhotnikov, K.V., The role of the exploration grid’s reference points and the reliability of assessment of the properties and the quality of the coal beds, Razved. Okhr. Nedr., 2018, no. 6, pp. 21–25.
5. Ivanov, V.P., Industrial and energetic classification of coal for standardization of reserves, Nedropol’zovanie XXI Vek, 2015, no. 10, pp. 116–123.