1. Brown, M., de la Roca, I., Vallejo, A., Ford, G., Casey, J., Aguilar, B., and Haacker, R. (1996). A Valuation Analysis of the Role of Cloud Forests in Watershed Protection: Sierra de las Minas Biosphere Reserve, Guatemala and Cusuco National Park, Honduras. Guatemala: RARE, Defensores de la Naturaleza and Fundación Ecologista Hector Rodrigo Pastor Fasquelle
2. An Economic Model of Soil Conservation
3. Kim, I.-H. (1984). An Economic Analysis of Watershed Practices: Impact of Grazing on Watershed (Erosion, Sedimentation, Valuation). Unpublished Ph. D. diss., Utah State University
4. Kumari, K. (1995). An Environmental and Economic Assesment of Forest Management Options: A Case Study in Malaysia, Environmental Economics Series, Environment Department Papers (Vol. 26, pp. 46). Washington, DC: World Bank
5. Calder, I. R. (1992). The Hydrological Impact of Land-Use Change (with Special Reference to Afforestation and Deforestation), Proceedings of the Natural Resources and Engineering Advisers Conference on Priorities for Water Resources Allocation and Management, Southampton, July 1992 (pp. 91–101). London: United Kingdom Overseas Development Administration