Amr, A. S. ., M. N. . Ahmad, and M. A. Abdullah. “Oak (Quercus Aegilops L.) Root Bark Tannins Astringency, Antioxidant Potential, and Use As Functional Tea”. Jordan Journal of Agricultural Sciences, vol. 16, no. 2, June 2020, pp. 27-38, doi:10.35516/jjas.v16i2.57.