Michaelsen, Per, and Batbold Demberelsuren. “Petro-Chemical Characterization and Depositional Setting of a Late Permian High Ash Coal Deposit, Central Mongolia”. Mongolian Geoscientist 29, no. 58 (June 11, 2024): 55–79. Accessed July 22, 2024. https://mongoliajol.info/index.php/MGS/article/view/3448.