A. Al-Riyami, N. Al-Manthary, S. N. Al-Busafi, and S. H. Al-Saidi, “Comparison of Chemical Composition and Antioxidant Activity of Essential Oil of Gum-Resin Obtained from Juniperus excelsa and Boswellia sacra”, ajc, vol. 29, no. 11, pp. 2570–2574, Oct. 2017.