@misc{indiciae9e638c1b7239,
  title = {Special article: calculus breakability--fragility and durility.},
  author = {S P Dretler},
  year = {1994},
  doi = {10.1089/end.1994.8.1},
  url = {https://pubmed.ncbi.nlm.nih.gov/8186775/},
  note = {Source identifier: 8186775}
}