Understanding orthodontic loop preactivation.

@article{Halazonetis1998UnderstandingOL,
  title={Understanding orthodontic loop preactivation.},
  author={Demetrios Halazonetis},
  journal={American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics},
  year={1998},
  volume={113 2},
  pages={237-41}
}