@misc{indiciaec5b484243365,
  title = {Letter: Cusum charts.},
  author = {D Robinson and J D Williamson},
  year = {1974},
  doi = {10.1016/s0140-6736(74)92632-4},
  url = {https://pubmed.ncbi.nlm.nih.gov/4130505/},
  note = {Source identifier: 4130505}
}