@misc{indiciaee94437f69493,
  title = {Optimal force, differential force, and anchorage.},
  author = {E H Hixon and H Atikian and G E Callow and H W McDonald and R J Tacy},
  year = {1969},
  doi = {10.1016/0002-9416(69)90083-9},
  url = {https://pubmed.ncbi.nlm.nih.gov/5253431/},
  note = {Source identifier: 5253431}
}