@article{articleef031e33,
title   = {Removal of black stains from teeth by photodynamic therapy: clinical and microbiological analysis},
author = {Pessoa, Larissa and Galvão, Virgilio and Damante, Carla and Sant'Ana, Adriana Campos Passanezi},
year = {2015},
doi = {10.1136/bcr-2015-212276},
journal   = {BMJ Case Reports}
}