@misc{indiciae9f1312a6ed05,
  title = {Linear mixed models with heterogeneous within-cluster variances.},
  author = {X Lin and J Raz and S D Harlow},
  year = {1997},
  url = {https://pubmed.ncbi.nlm.nih.gov/9290222/},
  note = {Source identifier: 9290222}
}