@misc{indiciaebcfdeb6700ac,
  title = {Two issues concerning the analysis of grouped data.},
  author = {S Selvin},
  year = {1987},
  doi = {10.1007/bf00149737},
  url = {https://pubmed.ncbi.nlm.nih.gov/3653356/},
  note = {Source identifier: 3653356}
}