@misc{indiciae458a61c6aa2e,
  title = {Re: Retention--retainers may be forever.},
  author = {R Berg},
  year = {1989},
  doi = {10.1016/0889-5406(89)90107-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/2589253/},
  note = {Source identifier: 2589253}
}