Tsagaan, B., Ganbaatar, O., Darizav, T., & Byambaa, K. (2020). Content and distribution of some chemical elements in the poplar leaves (Populus laurifolia) in Ulaanbaatar. Proceedings of the Mongolian Academy of Sciences, 60(4), 18-27. https://doi.org/10.5564/pmas.v60i4.1502