1. Quality Assurance for Research and Development and Non-routine Analysis, EURACHEM/CITAC Guide 2, LGC, London, 1998
2. ISO/IEC Guide 25. General requirements for the competence of calibration and testing laboratories, ISO, Geneva, 1990
3. EAL-G4. Accreditation for Chemical Laboratories (European co-operation for Accreditation (EA) and EURACHEM joint publication)
4. EAL-G18. Accreditation for Laboratories Performing Microbiological Testing (European co-operation for Accreditation (EA) and EURACHEM joint publication)
5. EAL-G5. Interpretation of Accreditation Requirements in ISO/IEC Guide 25 and EN 45001 for IT Testing Laboratories (European co-operation for Accreditation (EA) with ECITC)