Piva, E.; Correr-Sobrinho, L.; Sinhoreti, M. A. C.; Consani, S.; Demarco, F. F.; Powers, J. M. Influence of Energy Density of Different Light Sources on Knoop Hardness of a Dual-Cured Resin Cement . J Appl Oral Sci 2008, 16 (3), 189-193. https://doi.org/10.1590/S1678-77572008000300005.