Byambasuren, Tsagaan, Byambaa Khuukhenkhuu, Ganbaatar Ochirbat, and Darizav Tsedenbaljir. “Temporal Variation of the Pseudo Total Content of Heavy Metals in Ulaanbaatar Soil”. Proceedings of the Mongolian Academy of Sciences 59, no. 3 (December 31, 2019): 21–28. Accessed October 27, 2025. https://test.mongoliajol.info/PMAS/article/view/1243.