Sriamornsak, P., Burapapadh, K., Puttipipatkhachorn, S., & Nunthanid, J. (2013). Effect of Acidic Medium on Swelling and Release Behaviors of Chitosan-Reinforced Calcium Pectinate Gel Beads. Science, Engineering and Health Studies, 2(1), 37–44. https://doi.org/10.14456/sustj.2008.4