1. Standard EN 45001: General Criteria for the Operation of Testing Laboratories,1990
2. ICRU, 1993. Stopping Powers and Ranges for Protons and Alpha Particles. Report 49, International Commission on Radiation Units and Measurements, Bethesda.
3. Standard ISO 8769: Reference Sources for the Calibration of Surface Contamination Monitors: Beta-Emitters (maximum Beta Energy greater than 0.15 MeV) and Alpha-Emitters,1988
4. Guide to the Expression of Uncertainty in Measurement,1993
5. Standard ISO 9001: Quality Systems: Model for Quality Assurance in Design, Development, Production, Installation and Servicing,1994