Martins, G. C., Meier, M. M., Loguercio, A. D., Cecchin, F., Gomes, O. M. M., & Reis, A. (2015). Effects of zirconia nanoparticles addition to experimental adhesives on radiopacity and microhardness. Brazilian Journal of Oral Sciences, 12(4), 319–322. https://doi.org/10.20396/bjos.v12i4.8640945