R. Amid, M. Kadkhodazadeh, R. Fekrazad, and F. Hajizadeh, “Effect of Hand, Ultrasonic Scaler and Erbium-Doped Yttrium Aluminum Garnet (Er: YAG) Laser on the Morphology of Root Surfaces with Periodontitis: a Comparative in Vitro Scanning Electron Microscopy Study”, J laser Med Sci, vol. 3, no. 3, pp. 122–126, Jul. 2012.