1. International Atomic Energy Agency. IAEA Safeguards Glossaty 2001 edition, para. 6.35, International Nuclear Verification Series No.3, Vienna
2. ISO 17043:2010. Conformity assessment—general requirements for proficiency testing. International Organization for Standardization, Geneva, Switzerland
3. ISO 17034:2016. General requirements for the competence of reference materials producers. International Organization for Standardization, Geneva, Switzerland
4. ISO Guide 35 (2006) Reference materials—general and statistical principles for certification. International Organization for Standardization, Geneva
5. ISO 13528:2015, ISO/TC69/SC6. Statistical methods for use in proficiency testing by interlaboratory comparison. International Organization for Standardization, Geneva, Switzerland