12.
International Organization for Standardization (ISO), X and Gamma Reference Radiation for Calibrating Dosemeters and Doserate Meters and Determining Their Response as a Function of Photon Energy. Part 3: Calibration of Area and Personal Dosemeters and the Measurement of Their Response as a Function of Energy and Angle of Incidence (Geneva: ISO), International Standard ISO- 4037-3, 1999.