@misc{indiciaeca3fd0ccded5,
  title = {Contraception.},
  author = {A Szarewski and J Guillebaud},
  year = {1991},
  doi = {10.1136/bmj.302.6787.1224},
  url = {https://pubmed.ncbi.nlm.nih.gov/2043843/},
  note = {Source identifier: 2043843}
}