Hasan, M. K. ., Hassan, G. S. ., Rahman, S. ., Ali, M. S. ., Rahman, M. A. ., Hasan, M. M. ., & Tani, R. R. . (2021). Space Closure Rate in Mandibular Canine Retraction by Ni-Ti Closed Coil Spring: A Clinical Trial. Medicine Today, 33(2), 90–93. https://doi.org/10.3329/medtoday.v33i2.56050