To cite package ‘penppml’ in publications use:

Ferreras Garrucho D, Zylkin T (2025). penppml: Penalized Poisson Pseudo Maximum Likelihood Regression. R package version 0.2.4, https://github.com/tomzylkin/penppml.

Corresponding BibTeX entry:

  @Manual{,
    title = {penppml: Penalized Poisson Pseudo Maximum Likelihood
      Regression},
    author = {Diego {Ferreras Garrucho} and Tom Zylkin},
    year = {2025},
    note = {R package version 0.2.4},
    url = {https://github.com/tomzylkin/penppml},
  }