Kongkraphan, P., and B. Samruajbenjakun. “The Root Length Changes After Protraction of Mandibular Molars Combined With Corticotomy Assisted by Bone Grafting: 5 Year CBCT Follow-Up”. Khon Kaen University Dental Journal, vol. 23, no. 2, Aug. 2020, pp. 42-49, https://he01.tci-thaijo.org/index.php/KDJ/article/view/238439.