Grancay, Martin, and Nora Szikorova. “Liberalism in Foreign Trade Versus Liberalism in Air Transportation - Is There a Link?”. Panoeconomicus 61, no. 6 (December 15, 2014): 709–721. Accessed April 28, 2024. http://www.panoeconomicus.org/index.php/jorunal/article/view/491.