@article{vianna_zilio_ferraz_zaia_souza-filho_gomes_2009,  title={Concentration of hydrogen ions in several calcium hydroxide pastes over different periods of time},  volume={20},  ISSN={0103-6440},  url={https://doi.org/10.1590/S0103-64402009000500005},  DOI={10.1590/S0103-64402009000500005},  number={5},  journal={Brazilian Dental Journal},  publisher={Fundação Odontológica de Ribeirão Preto},  author={Vianna, Morgana Eli and Zilio, Danila M. and Ferraz, Caio Cezar Randi and Zaia, Alexandre Augusto and Souza-Filho, Francisco José de and Gomes, Brenda Paula Figueiredo de Almeida},  year={2009},  pages={382–388} }