The use of multiple stages of service queuing models In the analysis of passenger service in Sulaymaniyah International Airport. Al Kut Journal of Economics and Administrative Sciences, [S. l.], v. 6, n. 16, p. 111–128, 2014. Disponível em: https://kjeas.uowasit.edu.iq/index.php/kjeas/article/view/204. Acesso em: 24 apr. 2026.