To cite package ‘tongfen’ in publications use:

von Bergmann J (2026). tongfen: Make Data Based on Different Geographies Comparable. R package version 0.3.7, https://github.com/mountainmath/tongfen.

Corresponding BibTeX entry:

  @Manual{,
    title = {tongfen: Make Data Based on Different Geographies
      Comparable},
    author = {Jens {von Bergmann}},
    year = {2026},
    note = {R package version 0.3.7},
    url = {https://github.com/mountainmath/tongfen},
  }