Amangeldykyzy A, Kopobaуeva A, Askarova N, Ozhigin D, Portnov V. Study of rare earth elements in the coals of the Shubarkol deposit. CUMR [Internet]. 2021 Oct. 13 [cited 2024 May 2];319(4):48-56. Available from: http://kims-imio.com/index.php/main/article/view/73