@misc{misc4e3e4a25,
title   = {The influence of thickness and exposure time on the radiopacity of restorative materials},
author = {Esmeral, L. I. L. and Pereira, L. C. G. and Tavano, Orivaldo and Francisconi, Paulo Afonso Silveira},
year = {2003},
booktitle   = {General Sesscon of the IADR}
}