Osw, P. S., and P. A. Masum. “Multi-Elemental Analysis of Crepis Sahendi Boiss Grown in Iraqi Kurdistan Region Using ICP-OES/ICP-MS Techniques”. Science Journal of University of Zakho, vol. 5, no. 2, June 2017, pp. 210-3, doi:10.25271/2017.5.2.370.