1. Bulin, D., Iulian-Petru, T.: Preliminary Assessment of the COVID-19 Pandemic Impact on the Tourism Industry, Global Economic Observer, Nicolae Titulescu. University of Bucharest, Faculty of Economic Sciences; Institute for World Economy of the Romanian Academy, vol. 8, issue no. 1, pp. 41–46, May.
2. Campbell, D., Edgar, D., Stonehouse, G.: Business Strategy: An Introduction. Palgrave Macmillan (2011). http://www.palgrave.com/business/campbelledgarstonehouse/index.asp. Accessed 6 June 2021.
3. Cooper, C., Fletcher, J., Fyall, A., Gilbert, D., Wanhill, S.: Tourism: principles and practice, 6th edn. Pearson Education Limited, Harlow, U.K. (2018)
4. Croes, R.: Tourism specialization and economic output in small islands. Tourism Rev. 68(4), 34–48 (2013). https://doi.org/10.1108/TR-09-2013-0050
5. Dudovskiy, J.: Pepsico: Analysis of corporate strategy—Research methodology. [online] Research Methodology (2013). Available at: http://research-methodology.net/pepsico-analysis-of-corporate-strategy/. Accessed 6 June 2021.