Kairbekov, Z., Eshova, Z., Aubakirov, E., Daiynova, A., Alihanova, A., & Bashirbaeva, R. (2011). Humic acids – catalysts regenerative reactions of modelling systems. Chemical Bulletin of Kazakh National University, 64(4), 117-120. https://doi.org/https://doi.org/10.15328/chemb_2011_4117-120