1. Criteria for accreditation of dosimetry calibration laboratories by the American Association of Physicists in Medicine 2002
2. ISO Report 31-0: Quantities and Units: Part O: General Principles. International Organization for Standardization 1992
3. Uncertainty of calibrations at the Accredited Dosimetry Calibration Laboratories;Ibbott;Med. Phys.,1997
4. A chamber and electrometer calibration factor as determined by each of the five AAPM accredited dosimetry calibration laboratories;Blackwell;Med. Phys.,1993
5. Report of the 17th Meeting of the Consultative Committee for Ionizing Radiation (CCRI) Bureau International des Poid set Mesures www.bipm.org