Sharafani, Nasreen M. “The Impact of the Hidden Economy on Government Expenditure (Econometrics Analysis Study in Iraq)”. Humanities Journal of University of Zakho 5, no. 3 (September 30, 2017): 852–867. Accessed May 15, 2025. https://www.hjuoz2.uoz.edu.krd/index.php/hum/article/view/380.