@misc{indiciae034472c6bdf1,
  title = {Sample size calculations for ordered categorical data.},
  author = {J Whitehead},
  year = {1993},
  doi = {10.1002/sim.4780122404},
  url = {https://pubmed.ncbi.nlm.nih.gov/8134732/},
  note = {Source identifier: 8134732}
}