Rudrappa, Shivakumara Lachakkal, et al. “Synthesis and Characterization of Chemically Cross-Linked CMC Acrylamide Hydrogels”. Asian Journal of Chemistry, vol. 32, no. 5, Apr. 2020, pp. 1109-15, https://asianpubs.org/index.php/ajchem/article/view/2439.