Bibliography: 1. Osokin P. V. Foreign elements in lignite from a deposit in Central Mongolia. Voprosy geologii Pribaykal'ya i Zabaykal'ya [Baikal and Transbaikal regions: Geology considerations], Vol. 3 (5). Chita, 1968, pp. 144—146.
2. Tsennye i toksichnye elementy v tovarnykh uglyakh Rossii. Spravochnik [Valuable and toxic elements in marketable coals of Russia. Handbook], Moscow, Nedra, 1996, 238 p.
3. Kler V. R. Metallogeniya i geokhimiya uglenosnykh i slantsesoderzhashchikh tolshch SSSR. Zakonomernosti kontsentratsii elementov i metody ikh izucheniya [Metallogeny and geochemistry of coal-bearing and shale-containing strata in the USSR. Concentration patterns of elements and methods of analysis], Moscow, Nauka, 1988, 256 p.
4. Arbuzov S. I., Maslov S. G., Rikhvanov L. P., Sudyko A. F. Gold concentration forms in coals of Siberia. Geologiya i okhrana nedr. 2003, no 3, pp. 15–19.
5. Vnukov A. V., Admakin L.A. Litologo-fatsial'nye i geokhimicheskie usloviya nakopleniya germaniya v uglyakh Zabaykal'ya [Lithology, facies and geochemistry of germanium accumulation in Transbaikal coals], Chita, ZabNII, 1967, 363 p.
6. Fedorov A. V. Kompleksnoe ispol'zovanie ugley mestorozhdeniy Zabaykal'ya dlya polucheniya mikroelementov [Integrated use of Transbaikal coals for production of microelements], Moscow, IMGRE, 1989, 120 p.
7. Barabasheva E. E., Bryleva M. S. Occurrence forms and concentration mechanisms of gold in coal in terms of the coal fields in Transbaikal area. MIAB. Mining Inf. Anal. Bull. 2016, no 9, pp. 194—203. [In Russ].
8. Sidorova G. P., Yakimov A.A., Ovcharenko N. V. Content of microelements in brown coals of Transbaikal Region. IOP Conference Series Earth and Environmental Science. 2019. Vol .272. Article 032042. DOI: 10.1088/1755-1315/272/3/032042.
9. Sidorova G. P., Yakimov A.A., Ovcharenko N. V., Gushchina T. O. Rare and trace elements in Transbaikal coals. Vestnik Zabaykal'skogo gosudarstvennogo universiteta. 2019. Vol. 25, no 2, pp. 26—33. [In Russ].
10. Narkelyun L. F., Ofitserov V. F. Kompleksnoe ispol'zovanie iskopaemykh ugley [Integrated use of coals], Chita, ChitGTU, 2000, 270 p.
11. Suhana J., Mohd R. Analysis of natural radioactivity in coal and ashes from a coal fired power plant. Chemical Engineering Transactions. 2015. Vol. 45. Pp. 1549-1554. DOI: 10.3303/ CET1545259.
12. Sidorova G. P., Ovcharenko N. V. Assessment of radiological situation in the areaof Urtui open pit lignite mine. MIAB. Mining Inf. Anal. Bull. 2018, no 1, pp. 92—100. [In Russ]. DOI: 10.25018/0236-1493-2018-1-0-92-100.
13. Arbuzov S. I., Volostnov A. V., Ershov V. V. Geokhimiya i metallonosnost' ugley Krasnoyarskogo kraya [Geochemistry and metal content of coals in the Krasnoyarsk Krai], Tomsk, SТТ, 2008, 300 p.
14. Seredin V. V. Metal content of coal: Formation conditions and development prospects. Ugol'naya baza Rossii. T. VI. [Coal reserves and resources in Russia. Vol. VI], Moscow, Geoinformmark, 2004, pp. 453—518.
15. Yudovich Ya. E., Ketris M. P. Tsennye elementy-primesi v uglyakh [Valuable foreign elements in coals ], Ekaterinburg, UrO RAN, 2006, 538 p.
16. Hubbard T. E., Miller T. R., Hower J. C. The upper hance coal bed in southeastern Kentucky: palynologic, geochemical, and petrographic evidence for environmental succession. International Journal of Coal Geology. 2002. Vol.49. No 2–3. Pp. 177—194.
17. Karayigit A. I., Gayer R.A., Ortac F. E., Goldsmith S. Trace elements in the Lower Pliocene fossiliferous Kanglal lignithes, Sivas, Turkey. International Journal of Coal Geology. 2001. Vol. 47. No 2. Pp. 73—89.
18. Zhang J., Ren D., Zheng C., Zeng R., Chou C. L., Liu J. Trace Element abundances in major minerals of Late Permian coals from southwestern Guizhou province, China. International Journal of Coal Geology. 2002. Vol. 53. No 1. Pp. 55—64.