Dolmaa, G., Aleksandrova, G., Lesnichaya, M., Nominsetseg, B., Ganzaya, G., Bayraa, B., Sukhov, B., Regdel, D. and Trofimov, B. 2014. Properties of humic substances isolated from different natural sources. Mongolian Journal of Chemistry. 14, (Oct. 2014), 51–56. DOI:https://doi.org/10.5564/mjc.v14i0.199.