1. Diretrizes de proteção radiológica em radiodiagnóstico médico e odontológico: Portaria nº 453;Diário Oficial da União,1998
2. Patient dose reduction in diagnostic radiology;Documents of the NRPB,1990
3. Guidelines on patient dose to promote the optimization of protection for diagnostic medical exposures;Documents of the NRPB,1999
4. Recommendations of the International Commission on Radiological Protection. ICRP Publication 60,1991
5. Recommendations of the International Commission on Radiological Protection. ICRP Publication 73,1996