Zagana, E., Külls, C., & Udluft, P. (2000). Der Wasserhaushalt des Aliakmonas. Vom Wasser, 94, 29–39.
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Külls, C., Adar, E. M., & Udluft, P. (2000). Tracer Studies and Modelling of Regional Groundwater Systems-Resolving patterns of groundwater flow by inverse hydrochemical modelling in a semiarid Kalahari basin. IAHS Publications-Series of Proceedings and Reports-Intern Assoc Hydrological Sciences, 262, 447–452.
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Klock, H., Külls, C., & Udluft, P. (2001). Quantification of Groundwater Recharge-Estimating recharge values using hydrochemical and geological data: A case study from the semiarid Kalahari catchment of northern Namibia. IAHS Publications-Series of Proceedings and Reports-Intern Assoc Hydrological Sciences, 269, 25–32.
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Androvitsanea, A., Fawzy, M., Fuchs, J., Külls, C., Fahlbusch, H., & Heiden, J. (2018). Hydrologische Bedingungen im Heraion von Samos vom 12. bis 8. Jh. v. Chr. und ihre Bedeutung für die wasserbauliche Infrastruktur. Environmental Water Engineering, 1(1), 1–21.
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Gaj, M., Beyer, M., Hamutoko, J., Uugulu, S., Wanke, H., Koeniger, P., et al. (2014). How do soil types affect stable isotope ratios of 2H and 18O under evaporation: A Fingerprint of the Niipele subbasin of the Cuvelai-Etosha basin, Namibia. In EGU Geophysical Abstracts (5890).
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Joseph, J., & Külls, C. (2014). Calibration of 13C and 18O measurements in CO2 using Off-axis Integrated Cavity Output Spectrometer (ICOS). In EGU Geophysical Abstracts (659).
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Külls, C., Nunes, A., Köbel-Batista, M., Branquinho, C., Bianconi, N., & Costantini, E. (2014). Integrated use of soil physical and water isotope methods for ecohydrological characterization of desertified areas. In EGU Geophysical Abstracts (15430).
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Davila, P., & Külls, C. (2010). Reliability of current CFC data for age dating of water. In EGU Geophysical Abstracts (536).
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Külls, C. J., & Ritter, M. (2010). Deuterium excess anomaly of precipitation in Svalbard. In American Geophysical Union (Vol. 2010, 51).
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Davila, P., & Külls, C. (2009). Combined application of 85-Kr, 39-Ar with CFCs in contaminated aquifers. EGU Geophysical Abstracts, , 1074.
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