1.		A synergy between nature conservation and tourism in Europe's protected areas / World Wide Fund for Nature Data Publicação: 1999 Col.autor: World Wide Fund for Nature COTA(S): A-1605
2.		The potential effects of climate change on the Scottish tourist industry / S. J. Harrison, S. J. Winterbottom, C. Sheppard Autor: Harrison, Jeffrey S Coautor: ; Winterbottom, S. J. Sheppard, C. COTA(S): RE-1193