@misc{indiciae6651a2ed94ca,
  title = {The first-born child: toddlers' problems.},
  author = {M K Ounsted and C D Simons},
  year = {1978},
  doi = {10.1111/j.1469-8749.1978.tb15301.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/729923/},
  note = {Source identifier: 729923}
}