“Imangalieva А.N., Ishanova М.N., Seilkhanova G.А. Composite Materials Based on the Thistle Meal for the Treatment of Aqueous Solution from Pb2 + and Cd2+ Ions: Kazakh National University Named After Al-Farabi, Kazakhstan, Almaty”. 2018. Eurasian Journal of Ecology 56 (3): 68-76. https://bulletin-ecology.kaznu.kz/index.php/1-eco/article/view/830.