To cite package ‘swash’ in publications use:

  Wieland T (2025). _swash: Swash-Backwash Model for the Single
  Epidemic Wave_. R package version 1.1.0,
  <https://CRAN.R-project.org/package=swash>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {swash: Swash-Backwash Model for the Single Epidemic Wave},
    author = {Thomas Wieland},
    year = {2025},
    note = {R package version 1.1.0},
    url = {https://CRAN.R-project.org/package=swash},
  }