ชูจิตร กิตติพงษ์. “Adsorption of Cadmium, Chromium and Manganese by Natural Cellulose Materials”. Progress in Applied Science and Technology 6, no. 1 (June 28, 2016): 71–76. accessed August 26, 2026. https://ph02.tci-thaijo.org/index.php/past/article/view/243156.