To cite package ‘DonutMap’ in publications use:

  Nicosia A (2026). _DonutMap: Donut Maps with 'sf', 'ggplot2', and
  'leaflet'_. R package version 0.1.0,
  <https://github.com/aureliennicosiaulaval/donutmap>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {DonutMap: Donut Maps with 'sf', 'ggplot2', and 'leaflet'},
    author = {Aurélien Nicosia},
    year = {2026},
    note = {R package version 0.1.0},
    url = {https://github.com/aureliennicosiaulaval/donutmap},
  }