1. International Standards Organization, EN/ISO 15189, Medical Laboratories – Particular Requirements for Quality and Competence, ISO, Geneva, Switzerland, 2003
2. Uncertainty of results in routine qualitative analysis
3. Validation of qualitative analytical methods
4. BIPM, IEC, IFCC, ISO, IUPAC, IUPAP, OIML, Guide to the Expression of Uncertainty in Measurement, ISO, Geneva, Switzerland, 1993