1. Tritium/3He dating of shallow groundwater;Schlosser;Earth Planet. Sci. Lett.,1988
2. Groundwater dating with helium isotopes;Weise,1987
3. “Excess air” in groundwater;Heaton;J. Hydrol.,1981
4. Noble Gas Geochemistry;Ozima,1983
5. Helium Isotopes in Nature. Developments in Geochemistry 3;Mamyrin,1984