[1] Tuchin, A.I. (2004) Drainage in the Aral Sea Basin: Towards Sustainable Development Strategy. Report by SIC ICWC; Lead Author Tuchin, A.I., Tashkent.
[2] Dukhovniy, V.A., Sokolov, V.I., Horst, M.G., Sorokin, A.G., Nazariy, A.M. and Galustyan, A.G. (2012) Dynamics of the Present Water Balance in the Ferghana Valley in the Collection of Scientific Papers. Issue 13. SIC ICWC, Tashkent, 5-27.
[3] Data of the State Statistics Committee of RUz (2015).
[4] Yakubov, M.A., Yakubov, Kh.E. and Yakubov, Sh.Kh. (2011) Collector-Drainage Flow in Central Asia and Its Use for Irrigation Purposes. SIC ICWC, Tashkent, 189.
[5] Data of the Central Bank of Uzbekistan (2015).
http://cbu.uz/uzc/arkhiv-kursov-valyut/dinamika-kursov-valyut/