Houshmand, Behzad, Noushin Janbakhsh, Fatemeh Khalilian, and Mohammad Reza Talebi Ardakani. 2017. “Efficacy of Conventional Laser Irradiation Versus a New Method for Gingival Depigmentation (Sieve Method): A Clinical Trial”. Journal of Lasers in Medical Sciences 8 (2):88-94. https://journals.sbmu.ac.ir/jlms/article/view/13046.