Ehtesham, S. , Vakili, A.R., Danesh Mesgaran, M., Bankova, V.  (2024) ‘The Effects of Feeding Iranian Propolis Extracts to Holstein Dairy Cows on    Blood Metabolites, Milk Composition and Rumen Microbial Population’, Iranian Journal of Applied Animal Science, 14(1), pp. 17-25. doi: