@misc{indiciae23e1886f4f4f,
  title = {[Orthodontic practice using appliances without wires].},
  author = {H Bergmann},
  year = {1970},
  doi = {10.1007/bf01997119},
  url = {https://pubmed.ncbi.nlm.nih.gov/4992571/},
  note = {Source identifier: 4992571}
}