A. Hammad, S., and T. Hadi Abdullah Alheibi. “The Impact Of Some Variables Of The Economic Investment Environment On Foreign Direct Investment In The Kurdistan Region Of Iraq For The Period 2006-2016”. TANMIYAT AL-RAFIDAIN, vol. 37, no. 119, Sept. 2018, pp. 137-60, doi:10.33899/tanra.2018.159433.