Dr. Priyal Billaiya, et al. “Assessment of Efficacy (Time Taken During Stage I and Pain Perception) of Customized Lingual Orthodontic System”. Global Journal of Medical Research, vol. 19, no. J4, July 2019, pp. 25-30, https://medicalresearchjournal.org/index.php/GJMR/article/view/1863.