1. ISO Guide 33 (2000) Uses of certified reference materials. International Organization for Standardisation (ISO), Geneva
2. ISO Guide 32 (1997) Calibration in analytical chemistry and use of certified reference materials. International Organization for Standardisation (ISO), Geneva
3. Quality assurance for the analytical chemistry laboratory DB Hibbert (2007) Oxford University Press
4. EURACHEM/CITAC Guide - Quantifying uncertainty in analytical measurement (2000) 2nd edition SLR Ellison, M Rösslein, A Williams (eds)
5. EURACHEM/CITAC Guide – Traceability in chemical measurement (2003) SLR Ellison, B King, M Rösslein, M Salit, A Williams (eds)