@misc{indiciaedc2701f8f767,
  title = {Statistical evaluation of the rhythm method.},
  author = {C TIETZE and R G POTTER},
  year = {1962},
  doi = {10.1016/0002-9378(62)90166-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/13921194/},
  note = {Source identifier: 13921194}
}