To cite package ‘pch’ in publications use:

Frumento P (2025). pch: Piecewise Constant Hazard Models for Censored and Truncated Data. R package version 2.2, https://CRAN.R-project.org/package=pch.

Corresponding BibTeX entry:

  @Manual{,
    title = {pch: Piecewise Constant Hazard Models for Censored and
      Truncated Data},
    author = {Paolo Frumento},
    year = {2025},
    note = {R package version 2.2},
    url = {https://CRAN.R-project.org/package=pch},
  }