1. ANSI, 1995. American national standard traceability of radioactive sources to NIST and associated instrument quality control, N42.22-1995. American National Standards Institute, New York.
2. Limits for qualitative detection and quantitative determination: application to radiochemistry;Currie;Analytical Chemistry,1968
3. Fuel Cycle and Materials Administration (FCMA) of Atomic Energy Council of Executive Yuan, Regulations on Clearance Level for Radioactive Waste Management, 2004. Taipei, Taiwan, ROC.
4. International Atomic Energy Agency (IAEA), 2004. Application of the Concepts of Exclusion, Exemption and Clearance, SAFETY GUIDE RS-G-1.7, Vienna.
5. Establishing the traceability of radioactivity standards to the National Institute of Standards and Technology (NIST);Montgomerg;Journal of Radioanalytical and Nuclear Chemistry,1998