A. D. MAHMUD, Z. Aliyu, B. Abdullahi Oluwatoyin, A. Ahmed, S. Yahaya A, and A. Mohammed Saleh, “Extraction and Characterization of Keratin Protein from Chicken Feathers using Alkaline Hydrolysis Method: Effects of Sodium Sulphide Concentration and Shelf-life Evaluation”, Malay. J. Catal., vol. 7, no. 2, pp. 37–41, Dec. 2023.