Qader, Kulthum, and Abdulhameed Zahir. “Expenditure on Research and Development and Its Impact on Some Macroeconomic Variables: Iraq Is a Case Study for the Period 1990-2018”. Humanities Journal of University of Zakho 10, no. 1 (March 27, 2022): 178–194. Accessed April 19, 2024. https://hjuoz.uoz.edu.krd/index.php/hum/article/view/825.