To cite package ‘stoppingrule’ in publications use:

Martens MJ, Lian Q (2025). stoppingrule: Create and Evaluate Stopping Rules for Safety Monitoring. R package version 0.6, https://CRAN.R-project.org/package=stoppingrule.

Corresponding BibTeX entry:

  @Manual{,
    title = {stoppingrule: Create and Evaluate Stopping Rules for
      Safety Monitoring},
    author = {Michael J. Martens and Qinghua Lian},
    year = {2025},
    note = {R package version 0.6},
    url = {https://CRAN.R-project.org/package=stoppingrule},
  }