@misc{indiciaeb6d5e32bbe06,
  title = {Introduction to twinning.},
  author = {Simon Parsons},
  year = {2003},
  doi = {10.1107/s0907444903017657},
  url = {https://pubmed.ncbi.nlm.nih.gov/14573955/},
  note = {Source identifier: 14573955}
}