@misc{indiciaed8ce18997c76,
  title = {Difference between postpartum and nutritional amenorrhea.},
  author = {R E Frisch and J W McArthur},
  year = {1979},
  doi = {10.1126/science.203.4383.921-a},
  url = {https://pubmed.ncbi.nlm.nih.gov/419411/},
  note = {Source identifier: 419411}
}