Bala Raja Thalaimalai, Devi, et al. “Effect of Low-Level Laser Therapy and Platelet-Rich Fibrin on the Treatment of Intra-Bony Defects”. Journal of Lasers in Medical Sciences, vol. 11, no. 4, Oct. 2020, pp. 456-63, https://journals.sbmu.ac.ir/jlms/article/view/26517.