Chemical Composition and Biological Activity of the Essential Oil Isolated from the Leaves of Achillea fragrantissima Growing Wild in Yemen, Mansi, Iman, Ali Nasser A. Awadh, Mhaidat Nizar M., Hussain Khaled, Al-kaf Ali G., Anwar Sirajudheen, and Setzer William N. , Pharmacognosy Journal, September 2019, Volume 11, Issue 5, p.1077-1081, (2019)