ALKURDI, Ahmed A. H.. ATC System Simulation. Academic Journal of Nawroz University, [S.l.], v. 7, n. 3, p. 195-207, july 2018. ISSN 2520-789X. Available at: <http://journals.nawroz.edu.krd/index.php/ajnu/article/view/223>. Date accessed: 23 oct. 2019. doi: https://doi.org/10.25007/ajnu.v7n3a223.