1. The International Harmonized Protocol for the Proficiency Testing of (Chemical) Analytical Laboratories;Thompson;Pure Appl. Chem.,1993
2. ISO Guide 43: Proficiency Testing by Interlaboratory Comparisons – Part 1: Development and Operation of Proficiency Testing Schemes;International Organisation for Standardisation,1994
3. Proficiency Testing in Analytical Chemistry;Lawn,1997
4. International Laboratory Accreditation Cooperation. ILAC-G13:2000. Guidelines for the Requirements for the Competence of Providers of Proficiency Testing Schemes. Available at www.ilac.org.
5. ISO 13528:2015 Statistical Methods for Use in Proficiency Testing by Interlaboratory Comparison;International Organisation for Standardisation,2015