Munic, J. 1998. Influence of Tourist Activities on Mountain Regions. Vashakmadze, V. 1997. Valaoras, G., Pistola, N.A., and A.K. Pistola. The Role of Women in the Conservation and Development of the Dadia Forest Reserve, Greece.
Research results on ecotourism development in mountain regions of southern Russia.
Proyecto Piloto de Turismo Rural en el Ejido de San Nicolas Totolapan. Vol. 4, No. 4. Carlsson, U. 1997. The Aconcagua Waste Management Program. Otero, A.M. 1997.