@misc{indiciae01245b8d8b64,
  title = {Separating identical from fraternal twins.},
  author = {D J Cohen and E Dibble and J M Grawe and W Pollin},
  year = {1973},
  doi = {10.1001/archpsyc.1973.04200040021004},
  url = {https://pubmed.ncbi.nlm.nih.gov/4795884/},
  note = {Source identifier: 4795884}
}