@misc{indiciae74adec4f4f92,
  title = {Grouping and linear regression.},
  author = {K K Lan and M Halperin and G T Waldman},
  year = {1982},
  doi = {10.1016/0021-9681(82)90080-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/7061680/},
  note = {Source identifier: 7061680}
}