1. Hydrogeologische Untersuchungen im Malmkarst der Südlichen and Mittleren Frankenalb;Apel;Geologica Bavarica,1971
2. Bavarian Water Agency, 1996. Die Grundwasserneubildung in Bayern. 5/96.
3. Identification of localised recharge and conduit flow by combined analysis of hydraulic and physico-chemical spring response;Birk;Journal of Hydrology,2004
4. Experience gathered in low-level measurements of tritium in water;Eichinger,1980
5. Einsiedl, F., Maloszewski, P., Stichler, W., accepted. Estimation of denitrification potential in a karst spring using the isotopes of 15N and 18O of nitrate. Accepted in Biogeochemistry.