A. Etemadi, S. Shahabi, N. Chiniforush, E. Pordel, Z. Azarbayejani, and S. Heidari, “Scanning Electron Microscope (SEM) Evaluation of Composite Surface Irradiated by Different Powers of Er:YAG Laser”, J laser Med Sci, vol. 6, no. 2, pp. 80–84, Mar. 2015.