Tresia, Gresy Eva, et al. “Nonessential Amino Acids in Tropical Ruminant Feed: Investigating Grass and Legume Forages of Indonesia”. Journal of Advanced Veterinary and Animal Research, vol. 10, no. 4, Dec. 2023, pp. 820-9, https://www.banglajol.info/index.php/JAVAR/article/view/80974.