To cite package ‘regional’ in publications use:

Nowosad J (2026). regional: Intra- and Inter-Regional Similarity. R package version 0.5.0, https://github.com/nowosad/regional.

Corresponding BibTeX entry:

  @Manual{,
    title = {regional: Intra- and Inter-Regional Similarity},
    author = {Jakub Nowosad},
    year = {2026},
    note = {R package version 0.5.0},
    url = {https://github.com/nowosad/regional},
  }