1. ISO (1999) General requirements for the competence of testing and calibration laboratories, ISO/IEC 10725, Geneva, Switzerland
2. Eurachem, CITAC (2000) Quantifying uncertainty in analytical measurement, 2nd edn. Available via www.eurachem.ul.pt
3. Eurolab (2002) Measurement Uncertainty in testing—A short introduction on how to characterise accuracy and reliability of results including a list of useful references. Technical Report No. 1/2002, Germany
4. Nordtest (2004) Handbook for the calculation of measurement uncertainty in environmental laboratories, 2nd edn. Available via www.nordtest.org
5. ISO (1995) Guide to the expression of uncertainty in measurement, Geneva, Switzerland