Kairbekov Zhaksyntay Kairbekovich, Anatoly Malоletnev, Jeldybaeva Indira Mukhametkerimovna, и Abilmazhinova Didar Zamanbekovna. «DATA ON ANTIOXIDANT ACTIVITY OF HUMIC SUBSTANCES OF LOW-MINERALIZED SLUDGE SULPHIDE MUD (PELOIDS) AND THEIR CLASSIFICATION». Academic Scientific Journal of Chemistry, вып. 3, июнь 2019 г., сс. 32-37, https://journals.nauka-nanrk.kz/chemistry-technology/article/view/1298.