1. Eurachem (1995) Quantifying Uncertainty in Analytical Measurement (1st edn). Laboratory of the Government Chemist, London
2. Horwitz W (1997) VAM Bulletin no. 16: 5–6
3. Williams A (1997) VAM Bulletin no. 16: 6–7
4. ISO (1993) International Vocabulary of Basic and General Terms in Metrology. International Organization for Standardization, Geneva
5. Analytical Methods Committee (1995) Analyst 120: 2303–2308