1Zi mmer D,Renault D.Virtual water in food production and global trade:review of methodological issues and preli minary results[].Virtual Water Trade I HE.2003
2.Virtual Water,Green Water and Blue Water in China[].wwwnidecoethzch/news/past-events/colloquium-/Liu-Presentationpdf.
3Allan,J.A.‘Virtual water’:A long term solution for water shortMiddle Eastern economies?[]..1997
4Chapagain A K,Hoekstra A Y.Virtual water trade: A quantification of virtual water flows between nations in relation to international trade of livestock and livestock products[].Virtual Water Trade: Proceedings of the International Expert Meeting on Virtual Water Trade Value of Water Research Report Series NO.2003
3OKI T,SATO M,KAWAMURA A,et al. Virtual Water trade to Japan and in the World[M]//HOEKSTRA A Y. Virtual Water Trade: Proceedings of the International Exper Meeting onVirtual Water Trade,Research Report Series.IHE Delft,The Nether2 lands:2003.
4Virtual Water, Green Water and Blue Water in China [ EB/OL ]. www. nideco, ethz. ch/news/past events/colloquium 2003/Liu_Presentation. pdf.