1. Inter-comparison of INAA and ICP-MS results for Thorium determination in Pakistani diet;Akhter;Journal of Environmental Radioactivity,2002
2. ATSDR, 1990. Toxicological Profile for Thorium. Agency for Toxic Substances and Disease Registry, Atlanta, GA. U.S. Department for Health and Human Services. October 1990.
3. ATSDR, 1999a. Toxicological Profile for Uranium. Agency for Toxic Substances and Disease Registry, Atlanta, GA. U.S. Department for Health and Human Services. September 1999.
4. ATSDR, 1999b. Toxicological Profile for Ionizing Radiation. Agency for Toxic Substances and Disease Registry, Atlanta, GA. U.S. Department for Health and Human Services. September 1990.
5. Study on Chinese diet in 1990;Chen;Hygiene Research,1993