1. ISO 9000-9004. International Standards Organization (ISO), Geneva (1987).
2. EN 29 000-29 0004. Comité Européan de Normalisation (CEN), Brussels (1987).
3. BS5750: 1987. British Standards Institution (BSI), Park St, London (1987).
4. NAMAS Accrediation Standard General Criteria of Competence for Calibration and Testing Laboratories, M10. NAMAS Executive, NPL, Teddington (1989).
5. Precision, accuracy, and uncertainty in quantitative surface analyses by Auger‐electron spectroscopy and x‐ray photoelectron spectroscopy