1.		Passaporte Ambiental / Hotel Vila Park Data Publicação: 2009 Col.autor: Hotel Vila Park
2.		O novo paradigma energético no sector do Turismo / Carlos Ricardo Autor: Ricardo, Carlos
3.		Local discourses and international initiatives: sociocultural sustainability of tourism in Oulanka National Park, Finland / Riikka Puhakka [et al.] Resp- Sec.: Puhakka, Riikka Sarkki, Simo Cottrell, Stuart Siikamäki, Pirkko