@misc{indiciae1198871ba84e,
  title = {Tannic acid for smear layer removal: pilot study with scanning electron microscope.},
  author = {N C Bitter},
  year = {1989},
  doi = {10.1016/0022-3913(89)90023-1},
  url = {https://pubmed.ncbi.nlm.nih.gov/2724161/},
  note = {Source identifier: 2724161}
}