Rethinking park protection: treading the uncommon ground of environmental beliefs / Will LaPage
Sustentabilidade, turismo e áreas protegidas: a abordagem da resiliência no contexto do Parque Natural Vale do Guadiana / Cátia Sofia Magrito Ribeiro
OECD tourism papers - green innovation in tourism services / OCDE
Tourism in the green economy / UNWTO
Report 2011/2012: making a real social and economic contribution to Europe's economy / European Cruise Council