Abas, Ismail, et al. “Effects of Organic Acid and Bacterial Direct-Feed Microbial on Fattening Performance of Kivircik-Male Yearling Lambs”. Pakistan Journal of Nutrition, vol. 6, no. 2, Feb. 2007, pp. 149-54, https://doi.org/10.3923/pjn.2007.149.154.