1.		Challenges and opportunities for tourism development in small Island developing states / World Tourism Organization (UNWTO) Col.autor: OMT COTA(S): 13937; 13937-Dg
2.		A Model for Assessing the Level of Tourism Impacts and Sustainability of Coastal Cities / Beser Oktay Vehbi Autor: Vehbi, Beser Oktay Data Publicação: 2012 COTA(S): 14997-Dg
3.		Travel & tourism: economic impact 2012 - Portugal / World Travel & Tourism Council Data Publicação: 2012 Col.autor: World Travel & Tourism Council COTA(S): 14080-Dg