S. Shahabi, N. Chiniforush, and N. Juybanpoor, “Morphological Changes of Human Dentin after Erbium- Doped Yttrium Aluminum Garnet (Er:YAG) and Carbon Dioxide (CO2) Laser Irradiation and Acid-etch Technique: An Scanning Electron Microscopic (SEM) Evaluation”, J laser Med Sci, vol. 4, no. 1, pp. 48–52, Dec. 2012.