V. L. Schmitt, R. M. Puppin-Rontani, F. S. Naufel, D. Ludwig, J. K. Ueda, and L. Correr Sobrinho, “Effect of finishing and polishing techniques on the surface roughness of a nanoparticle composite resin”, Braz. J. Oral Sci., vol. 10, no. 2, pp. 105–108, Nov. 2015.