Buyan, Chuluun, and Bayartsengel Bayarjargal. “Possibility of Reducing Water Hardness With Biochar Derived from Waste Biomass”. Bulletin of the Institute of Chemistry and Chemical Technology 10, no. 10 (December 28, 2022): 65–74. Accessed April 16, 2024. https://mongoliajol.info/index.php/BICCT/article/view/2596.