@inproceedings{continuousinspectionschemescusum,
  title = {Continuous Inspection Schemes (CUSUM)},
  author = {E. S. Page},
  year = {1954},
  booktitle = {Biometrika 1954 6},
  url = {https://www.jstor.org/stable/2333009?seq=1#metadata_info_tab_contents},
}