@misc{indiciaee7e540ef49cb,
  title = {Adaptive sample size calculations in group sequential trials.},
  author = {W Lehmacher and G Wassmer},
  year = {1999},
  doi = {10.1111/j.0006-341x.1999.01286.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/11315085/},
  note = {Source identifier: 11315085}
}