@misc{indiciae19f875bac021,
  title = {Group sequential methods for an ordinal logistic random-effects model under misspecification.},
  author = {Bart Spiessens and Emmanuel Lesaffre and Geert Verbeke and KyungMann Kim},
  year = {2002},
  doi = {10.1111/j.0006-341x.2002.00569.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/12229991/},
  note = {Source identifier: 12229991}
}