1. Africa Economic Outlook (AEO) (2018), “Africa’s Macroeconomic Development and Structural Change in Africa” African Development Bank, Abidjan, Ivory Coast. Retrieved on May 1, 2018 from https://www.afdb.org/en/knowledge/publications/african-economic-outlook/.
2. Agyeiwaah, Elizabeth, and Adongo, Raymond (2016), “Identifying Core Determinants of Tourism Demand in Hong Kong Inbound Markets” International Journal of Tourism Cities. Vol. 2(1), pp. 17–28.
3. Akkemik, K. Ali (2012), “Assessing the Importance of International Tourism for the Turkish Economy: A Social Accounting Matrix Analysis” Tourism Management. Vol. 33(4), pp. 790–801.
4. Anderson, J. E., and Van Wincoop, E. (2003), “Gravity with Gravitas: A Solution to the Border Puzzle” American Economic Review. Vol. 93, pp. 170–192.
5. Andrés, A. T., Antonio, G. S., and Fransico, S. G. (2008), “The Length of Stay Determinants for Sun-and-Sand Tourism: An Application for the Region of Murcia” Journal Economic Literature. Vol. 16(1), p. 801.