1. Radiation protection, ICRP publication 26;International Commission on Radiological Protection,1977
2. Reduction in dental x-ray exposure during the past 60 years;Richards;J Am Dent Assoc,1981
3. Radiation absorbed from dental implant radiography: a comparison of linear tomography, CT scan, and panoramic and intra-oral techniques;Clark;J Oral Implantol,1990
4. Optimum placement of osseointegrated implants;Engelman;J Prosthet Dent,1988
5. Preprosthetic imaging in prospective;Kircos,1990