@misc{indiciaecdc13a4972a3,
  title = {Experiences with the butterfly chart.},
  author = {M V Kirtane and S N Merchant and S B Medikeri},
  year = {1986},
  doi = {10.1017/s002221510009890x},
  url = {https://pubmed.ncbi.nlm.nih.gov/3950477/},
  note = {Source identifier: 3950477}
}