1International Organization for Standardization. In Vitro Diagnostic Medical Devices- Measurement of Quantities in Samples of Biological Origin-Description of Reference Materials. ISO 15194, 2003.
2International Organization for Standardization. Clinical Laboratory Medicine-Requirements for Reference Measurement Laboratories. 1SO 15195,2003.
3International Organization for Standardization. General Requirements for the Competence of Testing and Calibration Laboratories. ISO 17025, 1999.
4International Organization for Standardization. Medical Laboratories-Particular Requirements for Quality and Competence. ISO 15189, 2003.
5Dybkaer R. Vocabulary for use in measurement procedures and description of reference materials in laboratory medicine. Eur J Clin Chem Clin Biochem ,1997, 35 : 141-173.
7International Organization for Standardization. In Vitro Diagnostic Medical Devices-Measurement of Quantities in Samples of Biological Origin -Metrological Traceability of Values Assigned to Calibrators and Control Materials. ISO 17511. 2003.
8International Organization for Standardization. In Vitro Diagnostic Medical Devices- Measurement of Quantifies in Samples of Biological Origin-Metrological Traceability of Values Catalytic Concentration of Enzymes Assigned to Calibrators and Control Materials. 1SO 18153, 2003.
9International Organization for Standardization. In Vitro Diagnostic Medical Devices- Measurement of Quantities in Samples of Biological Origin-Presentation of Reference Measurement Procedures. ISO 15193, 2003.
