O. D. Mohammed, M. N. Abdullah, N. Y. Abbo, and N. N. Salih, “A Comparison Effect Of feeding Barley or Soybean Meal Chemically Treated As A Source Of Undegradable Protein in Milk Production and Composition in Awassi Ewes”, JAEVS, vol. 4, no. 1, pp. 53–43, Mar. 2020, doi: 10.26389/AJSRP.O151219.