1. Decreto-Lei no. 167, 2002. Diário da República. Imprensa Nacional—Casa da Moeda, 18 July 2002.
2. Harshaw-Bicron, 1992. TLD Radiation Evaluation and Management System (TLD-REMS) User's Manual for use with TLD 8800 & 6600 Card Readers. REMS-0-U-0492-006. Bicron, Saint-Gobain/Norton Industrial Ceramics Corporation, Solon, OH, USA.
3. Harshaw-Bicron, 1994. Model 6600E Automatic TLD Workstation User's Manual. Publication no. 6600-E-U-0294-001. Bicron, Saint-Gobain/Norton Industrial Ceramics Corporation, Solon, OH, USA.
4. ISO 4037-1, 1996. X and gamma reference radiation for calibrating dosemeters and doserate meters and for determining their response as a function of photon energy—part 1: radiation characteristics and production methods. International Organization for Standardization, Geneva.
5. ISO 4037-3, 1999. X and gamma reference radiation for calibrating dosemeters and doserate meters and for 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. International Organization for Standardization, Geneva.