Mo, S. ., Kim, S. ., Sung, S. ., Chung, K. ., Chun, Y. ., Kook, Y. ., & Nelson, G. . (2011). Factors controlling anterior torque during C-implant-dependent en-masse retraction without posterior appliances. American Journal of Orthodontics and Dentofacial Orthopedics : Official Publication of the American Association of Orthodontists, Its Constituent Societies, and the American Board of Orthodontics, 140(1), 72-80. https://doi.org/10.1016/j.ajodo.2009.09.026 (Original work published 2011)