@misc{indiciaeea52d3cba77d,
  title = {Twin pregnancies--a continuing perinatal challenge.},
  author = {P A Hawrylyshyn and M Barkin and A Bernstein and F R Papsin},
  year = {1982},
  url = {https://pubmed.ncbi.nlm.nih.gov/7078899/},
  note = {Source identifier: 7078899}
}