Zagana, E., Obeidat, M., Külls, C., & Udluft, P. (2007). Chloride, hydrochemical and isotope methods of groundwater recharge estimation in eastern Mediterranean areas: a case study in Jordan. Hydrological Processes: An International Journal, 21(16), 2112–2123.
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Zagana, E., Külls, C., Udluft, P., & Constantinou, C. (2007). Methods of groundwater recharge estimation in eastern Mediterranean water balance model application in Greece, Cyprus and Jordan. Hydrological Processes: An International Journal, 21(18), 2405–2414.
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Zagana, E., Külls, C., & Udluft, P. (2000). Der Wasserhaushalt des Aliakmonas. Vom Wasser, 94, 29–39.
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Voerkelius, S., Külls, C., Santiago, M. M. F., Frischkorn, H., dos Santos Semrau, L. A., Heinrichs, G., et al. (2003). Investigations on water management and water quality in Picos/PI and Tauá/CE. In Global change and regional impacts (pp. 173–184). Springer, Berlin, Heidelberg.
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Udluft, P., & Külls, C. (2000). Mapping the availability and dynamics of groundwater recharge. Part 1: modelling techniques. In Proceedings of the Third Congress on Regional Geological Cartography and Information Systems (pp. 337–340).
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Udluft, P., Dünkeloh, A., Mederer, J., Külls, C., & Schaller, J. (2006). Re-evaluation of the groundwater resources of Cyprus. Lefkosia.
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Tröger, U., Dias, C. L., Guillaumon, J. R., Iritani, M. A., Külls, C., & Schuler, G. (2004). Remarks and new data about the recharge of the Guarani Aquifer System. In XXXIII IAH Congress, Abstracts, IAH, Mexico.
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Rehm-Berbenni, C., Druta A., Åberg, G., Neguer J., Külls, C., Patrizi, G., et al. (2005). Isotope Technologies Applied to the Analysis of Ancient Roman Mortars.
Abstract: Results of the CRAFT Project EVK4 CT-2001-30004
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Müller, M., Alaoui, A., Külls, C., Leistert, H., Meusburger, K., Stumpp, C., et al. (2014). Tracking water pathways in steep hillslopes by δ18O depth profiles of soil water. Journal of hydrology, 519, 340–352.
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Morin, E., Grodek, T., Dahan, O., Benito, G., Külls, C., Jacoby, Y., et al. (2009). Flood routing and alluvial aquifer recharge along the ephemeral arid Kuiseb River, Namibia. Journal of Hydrology, 368(1-4), 262–275.
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