1. Fortunately there are substitutes for water otherwise our hydro-political futures would be impossible;Allan;ODA,1993
2. Austria’s National Inventory Report 2009 – Submission under the United Nations Framework Convention on Climate Change and under the Kyoto Protocol;Anderl,2010
3. Modelling the likely impact of healthy eating guidelines on agricultural production and land use in England and Wales;Arnoult;Land Use Policy,2010
4. Metabolism of the Anthroposphere;Baccini,1991
5. Bach, M., Frede, H.G., 2005. Assessment of Agricultural Nitrogen Balances for Municipalities-Example Baden-Wuerttemberg (Germany). E-WAter. 15.