@misc{indiciae629ef9479037,
  title = {Direct retainers for distal-extension removable partial dentures.},
  author = {R P Frank},
  year = {1986},
  doi = {10.1016/0022-3913(86)90422-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/3534227/},
  note = {Source identifier: 3534227}
}