Polemis, Michael L., and Aikaterina Oikonomou. “Defining the Role of Competition in the Airport Industry: A Critical Assessment”. Journal of Reviews on Global Economics 6 (February 13, 2016): 42–57. Accessed May 2, 2024. https://www.lifescienceglobal.com/pms/index.php/jrge/article/view/4381.