Shultz, S. D. and J. A. Leitch (2001). The feasibility of wetland restoration toreduce flooding in the Red River Valley: a case study of the Maple RiverWatershed, North Dakota. Agribusiness & Applied Economics Report No. 23597. Fargo, North Dakota: Department of Agribusiness and Applied Eco- nomics, North Dakota State University.
Smith, D.M. and S. Barchiesi(2009). Environment and Infrastructure – Resil-ience To Climate Change Impacts on Water through Investments in Nature.Perspectives on water and climate change adaptation. The Hague: CPWC; Marseilles: World Water Council, Gland: IUCN; London: International Water Association. Available at: http://www.waterandclimate.org/index.php?id=5t hWorldWaterForumpublications810.
Smith,M.andothers (2006). PAY:EstablishingPaymentsforWatershedServices. Gland: IUCN.
Tallis, H. and others (2008). An ecosystem services framework to support bothpractical conservation and economic development. Proceedings of the Na- tional Academy of Sciences of the United States of America, vol. 105, No. 28, pp. 9457–9464.
The Nature Conservancy(2010). South America: Creating Water Funds for Peopleand Nature. Arlington, Virginia: The Nature Conservancy. Available at http:// www.nature.org/wherewework/southamerica/misc/art26470.html.
UNECE (2007). Recommendations on Payments for Ecosystem Services in Integrat-edWaterManagement.New York/Geneva: United Nations Economic Com- mission for Europe. Available at http://www.unece.org/index.php?id=11663.
WBCSD (2011). Guide to Corporate Ecosystem Valuation: A Framework for Im-proving Corporate Decision-making. Geneva: World Business Council for Sustainable Development.