2Stute M, Deak J. Environmental isotope study ( ^14 C, ^13 C, ^18O D, noble gases) on deep groundwater circulation system in Hun gary with reference to paleoclimate [ J ]. Radiocarbon, 1989,31 902-918.
3Kulongoski J T, Hilton D R, Cresswell R G, et al. Helium-4 characteristics of groundwaters from Central Australia : Comparative chronology with chlorine-36 and carbon-14 dating techniques [ J]. Journal of Hydrology,2008, 348 : 176-194.
4Kulongoski J T, Hilton D R, Izbicki J A. Helium isotope studies in the Mojave Desert, California: Implications for groundwater chronology and regional seismicity [ J ]. Chemical Geology, 2003, 202: 95-113.