Ecological effects of recreational horse riding in protected areas. Julkaisussa: The Ecological Society of America, 91st Annual meeting - Icons and Upstarts in Ecology, August 6-11, 2006, Memphis, Tennessee. Abstracts. CD-Rom - Törn, A.; Tolvanen, A.; Siikamäki, P. (US, 2006)
Keywords: ekologinen kestävyys; luontomatkailu