To cite package ‘CTP’ in publications use:

  Jordan P, Herpers M (2024). _CTP: Closed Testing Procedure (CTP)_. R
  package version 3.0.2, <https://github.com/openpharma/ctp>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {CTP: Closed Testing Procedure (CTP)},
    author = {Paul Jordan and Matthias Herpers},
    year = {2024},
    note = {R package version 3.0.2},
    url = {https://github.com/openpharma/ctp},
  }