@misc{indiciae2f1056a87c2b,
  title = {[Contraception by progestational agents administered in sequential form (author's transl)].},
  author = {J Barrat and F Durand Chèné},
  year = {1980},
  url = {https://pubmed.ncbi.nlm.nih.gov/7465385/},
  note = {Source identifier: 7465385}
}