1. Contribution to the study of composition and radioactivity of natural gases emanated from mineral and geothermal water sources;Cosma,1986
2. Natural radionuclides in the muds waters used in thermal therapy in Abano Terme, Italy;Doretti;Radiat. Prot. Dosim.,1992
3. Kvantovoe Izlucenie Radioactivnih Nuclidov;Gusev,1977
4. Radon emanation from soils;Markkanen;Radiat. Prot. Dosim,1992
5. Helium in geothermal water sources;Mastan,1987