@misc{indiciae619effea9805,
  title = {Early stopping in the two-sample problem for bounded random variables.},
  author = {D L DeMets and M Halperin},
  year = {1982},
  doi = {10.1016/0197-2456(82)90015-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/7067469/},
  note = {Source identifier: 7067469}
}