@misc{indiciae56ad9ce9a66a,
  title = {A method for obtaining periodic identical bitewing radiographs.},
  author = {E Kirkegaard and P Zeuner},
  year = {1974},
  doi = {10.1111/j.1600-0722.1974.tb01923.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/4532802/},
  note = {Source identifier: 4532802}
}