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Water balance of global aquifers revealed by groundwater footprint
The 6 references without a DOI — listed, not checked
no DOI — not checkedImpact of water withdrawals from groundwater and surface water on continental water storage variations
no DOI — not checkedA study of non-steady groundwater flow with special reference to the reservoir-coefficient
no DOI — not checkedAllen RG, Pereira LS, Raes D, Smith M. Crop evapotranspiration-guildelines for computing crop water requirements. FAO Irrigation and Drainage Paper 56, FAO, Rome; 1998.
no DOI — not checkedRohwer J, Gerten D, Lucht W. Development of functional irrigation types for improved global crop modelling. No. 104 in, PIK Report; 2007.
no DOI — not checkedFAO Aquastat on-line database. Food and Agricultural Organization, Rome, Italy, Available: <http://faostat.fao.org>; 2010.
no DOI — not checkedNonsustainable groundwater sustaining irrigation: a global assessment
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