1. International Organization for Standardization (ISO). Reference number KS Q ISO/IEC 17025. General requirements for the competence of testing and calibration laboratories. ISO. 2017.
2. International Organization for Standardization (ISO). Reference number KS Q ISO/IEC 17043. Conformity assessment - general requirements for proficiency testing. ISO. 2010.
3. Proficiency Test for the Dosimetry Audit Service Provider
4. International Organization for Standardization (ISO). Reference number KS Q ISO 13528. Statistical methods for use in proficiency testing by interlaboratory comparison. ISO. 2015.
5. International Organization for Standardization (ISO). ISO/IEC Guide 98-3. Uncertainty of measurement - part 3: guide to the expression of uncertainty in measurement (GUM:1995). ISO. 2008.