@misc{indiciaeba16ca268e13,
  title = {Dental calculus. A biophysical study.},
  author = {A FORSBERG and C LAGERGREN},
  year = {1960},
  doi = {10.1016/0030-4220(60)90317-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/13824018/},
  note = {Source identifier: 13824018}
}