@article{articlec544d67d,
title   = {Effect of ultrasonic activation on pH and calcium released by calcium hydroxide pastes in simulated external root resorption},
author = {Duarte, Marco Antonio Hungaro and Balan, Nickolas V. and Zeferino, Marcia A. and Vivan, Rodrigo Ricci and Morais, Carlos Alberto H. and Tanomaru-Filho, Mário and Ordinola-Zapata, Ronald and Moraes, Ivaldo Gomes de},
year = {2012},
doi = {10.1016/j.joen.2012.03.005},
journal   = {Journal of Endodontics}
}