1.		Towards Measuring the Economic Value of Wildlife Watching Tourism in Africa – Briefing Paper / World Tourism Organization (UNWTO) Data Publicação: 2015 Col.autor: World Tourism Organization COTA(S): 16330-Dg
2.		Oferta transversal em Portugal : Parques temáticos e de diversão / Patrícia Afonso Autor: Afonso, Patrícia COTA(S): RP-381
3.		Nature-based tourism and neoliberalism: concealing contradictions / Rosaleen Duffy Autor: Duffy, Rosaleen COTA(S): RE-1775