1. Global Deserts Outlook,2006
2. Population Reference Bureau: 2009 World Population Data Sheet; 2009. http://www.prb.org/pdf09/09wpds_eng.pdf.
3. Finding the Balance: Population and Water Scarcity in the Middle East and North Africa;Roudi-Fahimi,2002
4. Water resources constraint force on urbanization in water deficient regions: a case study of the Hexi Corridor, arid area of NW China;Bao;Ecol Econ,2007
5. Water problems brought out by citifying construction and measures;Song;J Water Resour Eng,2004