M. Yusuf, M. M. Al-Oqail, E. S. Al-Sheddr, A. J. Al-Rehaily, and M. A. Rahman, “Diversity of Medicinal Plants in the Flora of Saudi Arabia 3: An inventory of 15 Plant Families and their Conservation Management”, Int. J. Environ., vol. 3, no. 3, pp. 312–320, Sep. 2014.