@misc{indiciaed33f0561691e,
  title = {Comparison of the spending function method and the Christmas tree correction for group sequential trials.},
  author = {N Stallard and K M Facey},
  year = {1996},
  doi = {10.1080/10543409608835149},
  url = {https://pubmed.ncbi.nlm.nih.gov/8854238/},
  note = {Source identifier: 8854238}
}