The List of Wetlands of International Importance (PDF), su ramsar.org, The Secretariat of the Convention on Wetlands (Ramsar, Iran, 1971) Rue Mauverney 28, CH-1196 Gland, Switzerland, 13 settembre 2017. URL consultato il 6 ottobre 2017.
worldbank.org
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A. Ryabtsev e M. Yeliseev, Report 3 Preliminary Environmental Impact Assessment (Pre-EIA) (Book 1) (PDF), su Syrdarya Control and Northern Aral Sea,Phase-2 (SYNAS-2) Feasibility Study, Republic of Kazakhstan Ministry of Environment and Water Resources Committee for Water Resources, 2014, pp. 26-27. URL consultato il 23 marzo 2017-03-23.