Omer علي سالم. “Finding Out the Quantity and Quality of Chitin and Chitosan in Harika Cartilage: A Comparative Study”. University of Aden Journal of Natural and Applied Sciences 19, no. 2 (August 31, 2015): 281–290. Accessed April 3, 2025. https://uajnas.adenuniv.com/index.php/uajnas/article/view/292.