1. Fortunately there are substitutes for water otherwise our hydro-political futures would be impossible;Allan,1993
2. Systemic input–output computation of green and blue virtual water ‘flows’ with an illustration for the Mediterranean region;Antonelli;Water Resour. Manag.,2012
3. I. Arto, A. Genty, J.M. Rueda-Cantuche, A. Villanueva V. Andreoni. Global Resources Use and Pollution. Vol. II, Country factsheets. Luxembourg. European Commission. ISBN 978-92-79-25941-8, 2012
4. I. Arto, A. Genty, J.M. Rueda-Cantuche, A. Villanueva, V. Andreoni. Global Resources Use and Pollution. Vol. I, Production, Consumption and Trade (1995–2008). Luxembourg. European Commission. ISBN 978-92-79-25929-6, 2012
5. Recent history and geography of virtual water trade;Carr;Plos. ONE,2013