A.P. GUPTA, and SUDHIR G. WARKAR. “SYNTHESIS, CHARACTERIZATION AND SWELLING PROPERTIES OF POLY (ACRYLAMIDE-CL-CARBOXYMETHYLGUARGUM) HYDROGELS”. International Journal of Pharma and Bio Sciences, vol. 6, no. 1, Mar. 2015, pp. 516-29, https://ijpbs.net/index.php/journal/article/view/3925.