1. http://www.iso.ch.
2. ISO/DIS 15189: Quality management in the medical laboratory,2000
3. Essential criteria for quality systems in laboratory medicine;Jansen;Eur. J. Clin. Chem. Clin. Biochem.,1997
4. ISO/IEC Guide 25: General requirements for the competence of calibration and testing laboratories,1990
5. EN 45001: General criteria for the operation of testing laboratories,1991