Tsagaan, B., O. Ganbaatar, T. Darizav, and K. Byambaa. “Content and Distribution of Some Chemical Elements in the Poplar Leaves (Populus Laurifolia) in Ulaanbaatar”. Proceedings of the Mongolian Academy of Sciences, vol. 60, no. 4, Dec. 2020, pp. 18-27, doi:10.5564/pmas.v60i4.1502.