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Wada, Yoshihide; van Beck, Rens; Viviroli, Daniel; Dürr, Hans; Weingartner, Rolf; Bierkens, Marc (2011). Global Monthly Water Stress II: Water demand and severity of water stress. Water resources research, 47(7), n/a-n/a. Washington, D.C.: American Geophysical Union 10.1029/2010WR009792
