Czarnecka, Elżbieta, and Jacek Nowaczyk. “Swelling Properties of Biodegradable Superabsorbent Polymers”. Sustainable Chemical Engineering 2, no. 1 (December 22, 2020): 1-7. Accessed January 22, 2021. http://ojs.wiserpub.com/index.php/SCE/article/view/680.