To cite package ‘tmap.cartogram’ in publications use:

  Tennekes M (2025). _tmap.cartogram: Extension to 'tmap' for Creating
  Cartograms_. R package version 0.1,
  <https://CRAN.R-project.org/package=tmap.cartogram>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {tmap.cartogram: Extension to 'tmap' for Creating Cartograms},
    author = {Martijn Tennekes},
    year = {2025},
    note = {R package version 0.1},
    url = {https://CRAN.R-project.org/package=tmap.cartogram},
  }