@misc{indiciae8d9ae4f44c8f,
  title = {Contraceptive efficacy determination by postcoital testing.},
  author = {H Brehm and I Albrecht},
  year = {1978},
  doi = {10.1016/s0015-0282(16)43090-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/580086/},
  note = {Source identifier: 580086}
}