Devito, Karina Lopes, Maurício José Rubira, José Roberto Tamburús, e Marco Aurélio Sicchiroli Lavrador. 2006. “Copper Filter for Dental Radiography: Revaluation of Radiographic Contrast”. Revista De Ciências Médicas 15 (6). https://seer.sis.puc-campinas.edu.br/cienciasmedicas/article/view/1078.