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Torgersen, T.; Purtschert, Roland; Philips, F. M.; Plummer, L. N.; Sanford, W. E.; Suckow, A. (2013). Defining groundwater age. In: International Atomic Energy Agency, (ed.) Isotope Methods for Dating Old Groundwater (pp. 21-32). Vienna: IAEA
Sturchio, N. C.; Purtschert, Roland (2013). Krypton-81 case study: the nubian aquifer, Egypt. In: International Atomic Energy Agency, (ed.) Isotope Methods for Dating Old Groundwater (pp. 319-324). Vienna: IAEA
