1. Africa’s Lakes: atlas of our changing environment;UNEP;U Nations Environ. Program.,2006
2. T. Petr, Inland Water Resources and Aquaculture Service, 2005, .
3. R.T. Watson, M.C. Zinyowera, R. Moss, Dokken, J. David, IPCC special report on the regional impacts of climate change—an assessment of vulnerability (1997) 517 p. http://www.grida.no/climate/ipcc/regional/index.htm.
4. G.-M. Zinabu, Human Interactions and Water Quality in the Horn of Africa (1998), http://www.aaas.org/international/africa/ewmi/zinabu.htm.
5. NASA, A shadow of a Lake: Africa’s disappearing lake Chad. National Aeronautics and Space Agency: Goddard Space Flight Center (2001). http://www.gsfc.nasa.gov/gsfc/earth/environ/lakechad/chad.htm.