T. N. Musa, N. M. Salih, and W. S. Ulaiwi, “Detection of Some Active Compounds in Aqueous and Ethanolic Extracts of Iraqi Propolis and Examine Their Antibacterial Effects”, Pak. J. Nutr., vol. 11, no. 1, pp. 83–87, Dec. 2011, doi: 10.3923/pjn.2012.83.87.