I. D. Clark and P. Fritz, Environmental Isotopes in Hydrology, 1997.

P. K. Aggarwal, J. R. Gat, and K. F. Froehlich, Isotopes in the water cycle; past, 512 present and future of a developing science, pp.381-513, 2005.

D. Z. Groundwater, F. Sun, and . Bryan, 517 [8] IPCC report, in: IPCC Third Assessment Report -Climate Change Accessible at 518 http Earth surface processes, Geophysical monograph 189, pp.1-12, 1997.

M. Hulme, T. J. Osborn, T. C. Johns, and . Gat, Stable isotopes 528 hydrology, deuterium and oxygen 18 in the water cycle Worldwide survey of isotopes in precipitation, Geophys. Res. Let. Science IAEA Report, vol.2515, issue.530, pp.1702-527, 1961.

P. Basin, Portugal aquifer (data from [39]). Switzerland (data from 599 [40] and reference therein) Lorraine aquifer (Eastern France