Nazarbek, Ulzhalgas, Saule Nazarbekova, Perizat Abdurazova, Maksat Kambatyrov, и Yerkebulan Raiymbekov. «CHEMICAL EXPRESSION OF THE STRUCTURE OF HUMIC SUBSTANCES IN TERMS OF COMPLEX COMPOUNDS». Academic Scientific Journal of Chemistry, no. 1 (март 15, 2022): 58–66. просмотрено декабрь 5, 2025. http://89.250.84.46/chemistry-technology/article/view/3182.