1. Athanasopoulou A (2013) Tourism as a driver of economic growth and development in the EU-27 and ASEAN regions. European Union Centre in Singapore. http://www.eucentre.sg/wp-content/uploads/2013/12/EUCResearchBrief_TourismEU27ASEAN.pdf
2. Jucan CN, Jucan MS (2013) Travel and tourism as a driver of economic recovery. Proc Econ Financ 6:81–88
3. Baromey N (2008) Ecotourism as a tool for sustainable rural community development and natural resources management in the Tonle sap biosphere reserve. Kassel University Press, Kassel
4. UNWTO (2016) UNWTO tourism highlights: tourism market trends. Madrid
5. Fritsch A, Johansen K (2004) Ecotourism in Appalachia: marketing the mountains. The University Press of Kentucky, Kentucky