@misc{indiciae56a90ca4a77d,
  title = {Long-term experience with direct-bonded lingual retainers.},
  author = {E H Dahl and B U Zachrisson},
  year = {1991},
  url = {https://pubmed.ncbi.nlm.nih.gov/1814943/},
  note = {Source identifier: 1814943}
}