@misc{indiciae0130bbf88d86,
  title = {Group sequential large sample T2-like chi2 tests for multivariate observations.},
  author = {John M Lachin and Samuel W Greenhouse and Oliver M Bautista},
  year = {2003},
  doi = {10.1002/sim.1637},
  url = {https://pubmed.ncbi.nlm.nih.gov/14566920/},
  note = {Source identifier: 14566920}
}