@misc{indiciae9ce16a190b60,
  title = {Twin concordance. A more general model.},
  author = {G Allen and Z Hrubec},
  year = {1979},
  doi = {10.1017/s0001566000009284},
  url = {https://pubmed.ncbi.nlm.nih.gov/575693/},
  note = {Source identifier: 575693}
}