Budianto, Emil, Siti Prilia Muthoharoh, and Noverra Mardhatillah Nizardo. 2015. “Effect of Crosslinking Agents, PH and Temperature on Swelling Behavior of Cross-Linked Chitosan Hydrogel”. Asian Journal of Applied Sciences 3 (5). https://ajouronline.com/index.php/AJAS/article/view/3099.