@misc{indiciae2ed946788533,
  title = {Group sequential designs for phase II trials with historical controls.},
  author = {M N Chang and J J Shuster and J L Kepner},
  year = {1999},
  doi = {10.1016/s0197-2456(99)00008-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/10440562/},
  note = {Source identifier: 10440562}
}