M. A. Kairalla, A. A. Aburas, and kurmuan A. Omar, “Effect of Probiotic, Prebiotic, Synbiotic and Medicinal Plants on Productive Performance of Broilers Fed on Different Levels of Protein”, mjsc, vol. 33, no. 4, pp. 306–322, Dec. 2018, doi: 10.54172/mjsc.v33i4.298.