1. Agreement between the Governments of the Republic of Botswana, the Kingdom of Lesotho, the Republic of Namibia and the Republic of South Africa on the Establishment of the Orange-Senqu River Commission, signed on November 3rd, 2000.
2. Agreement between the Governments of the Republic of Namibia and the Government of the Republic of South Africa on the Establishment of a Permanent Water Commission, signed on September 14, 1992, Noordoewer, Namibia.
3. Australian Government. (2015). National climate change resilience and adaptation strategy summary. Retrieved 20 February 2018 from http://www.environment.gov.au/system/files/resources/3b44e21e-2a78-4809-87c7-a1386e350c29/files/national-climate-resilience-and-adaptation-strategy-summary.pdf
4. Bakker, M. H. N. (2007). Transboundary river floods: Vulnerability of continents, international River Basins and Countries. PhD Dissertation. Oregon State University. Retrieved 16 July 2012 from http://www.transboundarywaters.orst.edu/publications/abst_docs/Bakker_Dissertation.pdf