1. ISO/IEC Guide 99 (2007) International vocabulary of metrology—basic and general concepts and associated terms (VIM). ISO, Geneva
2. ISO Guide 35 (2006) Reference materials—general and statistical principles for certification. ISO, Geneva
3. ISO 17025 (2005) General requirements for the competence of testing and calibration laboratories. ISO, Geneva
4. Eurachem, CITAC (2003) Traceability in chemical measurement
5. Cox M (2007) Metrologia 44:187–200