@misc{indiciae2a8921259877,
  title = {Differential premolar extractions.},
  author = {C L Steyn and R J du Preez and A M Harris},
  year = {1997},
  doi = {10.1016/s0889-5406(97)70074-x},
  url = {https://pubmed.ncbi.nlm.nih.gov/9387833/},
  note = {Source identifier: 9387833}
}