@misc{indiciaee5e67e10bf7e,
  title = {Natural methods for fertility control: a prospective study--First Part.},
  author = {M Barbato and G Bertolotti},
  year = {1988},
  url = {https://pubmed.ncbi.nlm.nih.gov/2902027/},
  note = {Source identifier: 2902027}
}