To cite package ‘CPCAT’ in publications use:

  Lehmann R (2024). _CPCAT: The Closure Principle Computational
  Approach Test_. R package version 1.0.0,
  <https://CRAN.R-project.org/package=CPCAT>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {CPCAT: The Closure Principle Computational Approach Test},
    author = {René Lehmann},
    year = {2024},
    note = {R package version 1.0.0},
    url = {https://CRAN.R-project.org/package=CPCAT},
  }