Peter, Ijwo Omirenyi, and B. A Kyenge. “Synthesis, Physicochemical Analysis, and Characterisation of Periwinkle-Based Chitosan”. Journal of Discoveries in Applied and Natural Science 4, no. 1 (January 30, 2026): 15–25. Accessed April 2, 2026. https://journals.proindex.uz/index.php/JDANS/article/view/3169.