Nguyen, Thi Ngoc Binh, Thi Thua An Trinh, Uy Thu Nguyen, and Thi Anh Dao Dong. “Study of Glycosaminoglycans Sulphate (GAGs) Recovery Efficiency from the Hydrolysis of Chicken Kneel Cartilage by Alcalase 2.4L”. Old Journal, no. 117 (March 15, 2017): 86–92. Accessed August 2, 2025. https://jst.vn/index.php/old/article/view/461.