@misc{indiciaea05c3710deed,
  title = {Monoamniotic twins.},
  author = {K B Lawrenson and H S Roberts},
  year = {1971},
  doi = {10.5694/j.1326-5377.1971.tb87478.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/5541596/},
  note = {Source identifier: 5541596}
}