To cite package ‘geonuts’ in publications use:

  Katona A, Kurbucz M (2026). _geonuts: Identification and
  Visualisation of European NUTS Regions from Geolocations_. R package
  version 1.0.1, <https://github.com/aikatona/geonuts>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {geonuts: Identification and Visualisation of European NUTS Regions from
Geolocations},
    author = {Attila I. Katona and Marcell T. Kurbucz},
    year = {2026},
    note = {R package version 1.0.1},
    url = {https://github.com/aikatona/geonuts},
  }