@misc{indiciaec4ca3840b5f2,
  title = {Efficient group sequential designs when there are several effect sizes under consideration.},
  author = {Christopher Jennison and Bruce W Turnbull},
  year = {2006},
  doi = {10.1002/sim.2251},
  url = {https://pubmed.ncbi.nlm.nih.gov/16220524/},
  note = {Source identifier: 16220524}
}