“Research on the Efficiency of Waste Water Purification from Chromium(IIІ) Ions by Bentonite Clays”. Visnyk of Vinnytsia Politechnical Institute, no. 3 (June 24, 2020): 7–12. Accessed November 15, 2026. https://vpi.sprava.net/index.php/visnyk/article/view/2493.