Haddadin, M.S.Y., I. Nazer, Sara` Jamal Abu Raddad, and R.K. Robinson. “Effect of Propolis on Two Bacterial Species With Probiotic Potential”. Pakistan Journal of Nutrition 7, no. 2 (February 15, 2008): 391–394. Accessed August 23, 2025. https://pjnonline.org/pjn/article/view/654.