@misc{indiciae203cf503555b,
  title = {Simplified technique for blocking out undercuts during direct overdenture matrix attachment.},
  author = {Luis G Keys and E Karina Alarcon},
  year = {2002},
  url = {https://pubmed.ncbi.nlm.nih.gov/12239490/},
  note = {Source identifier: 12239490}
}