1. Argonne National Laboratory (2005) Thorium. Human Health Fact Sheet. ANL, Chicago
2. Aurand K, Bücker H, Hug O et al (1974) Die natürliche Strahlenexposition des Menschen. Thieme, Stuttgart, S 84
3. Chao JH, Niu H, Chiu CY, Lin C (2007) A potential dating technique using 228Th/228Ra ratio for tracing the chronosequence of elemental concentrations in plants. Appl Radiat Isot 65:641–648
4. Ellet W (1988) Health risks of radon and other internally deposited alpha-emitters, BEIR IV. National Academy Press, Washington, S 245
5. Garg V, Oberoi SS, Gorea RK, Kaur K (2004) Changes in the levels of vitreous potassium with increasing time since death. J Indian Acad Forensic Med 26(4):136–139