@misc{indiciae1484e2c1ca82,
  title = {Multilevel analysis with messy data.},
  author = {N T Longford},
  year = {2001},
  doi = {10.1177/096228020101000605},
  url = {https://pubmed.ncbi.nlm.nih.gov/11763551/},
  note = {Source identifier: 11763551}
}