To cite package ‘perry’ in publications use:

Alfons A (2021). perry: Resampling-Based Prediction Error Estimation for Regression Models. R package version 0.3.1, https://github.com/aalfons/perry.

Corresponding BibTeX entry:

  @Manual{,
    title = {perry: Resampling-Based Prediction Error Estimation for
      Regression Models},
    author = {Andreas Alfons},
    year = {2021},
    note = {R package version 0.3.1},
    url = {https://github.com/aalfons/perry},
  }