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Zappala, J. C.; Bailey, K.; Mueller, P.; O'Connor, T. P.; Purtschert, Roland (2017). Rapid processing of ⁸⁵5 Kr/Kr ratios using Atom Trap Trace Analysis. Water resources research, 53(3), pp. 2553-2558. American Geophysical Union 10.1002/2016WR020082
Sturchio, N. C.; Du, X.; Purtschert, R.; Lehmann, B. E.; Sultan, M.; Patterson, L. J.; Lu, Z.-T.; Müller, P.; Bigler, T.; Bailey, K.; O'Connor, T. P.; Young, L.; Lorenzo, R.; Becker, R.; El Alfy, Z.; El Kaliouby, B.; Dawood, Y.; Abdallah, A. M. A. (2004). One million year old groundwater in the Sahara revealed by krypton-81 and chlorine-36. Geophysical Research Letters, 31(5), n/a-n/a. American Geophysical Union 10.1029/2003GL019234
