Imperiano, M. T., Khoury, H. J., Pontual, M. L. A., Montes, M. A. J. R., & Silveira, M. M. F. (2016). Comparative radiopacity of four lowviscosity composites. Brazilian Journal of Oral Sciences, 6(20), 1278–1282. https://doi.org/10.20396/bjos.v6i20.8642965