Miwada, I. S., I. Sukada, W. S. Yupardhi, and S. Lindawati. “Amino Acid Profile on Shank Skin of Livestock and Antibacterial Potential Study”. International Research Journal of Engineering, IT and Scientific Research, vol. 3, no. 4, July 2017, pp. 110-6, https://sloap.org/journals/index.php/irjeis/article/view/556.