To cite package ‘leaflet.extras2’ in publications use:

  Sebastian G (2026). _leaflet.extras2: Extra Functionality for
  'leaflet' Package_. R package version 1.3.4.9000,
  <https://github.com/trafficonese/leaflet.extras2>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {leaflet.extras2: Extra Functionality for 'leaflet' Package},
    author = {Gatscha Sebastian},
    year = {2026},
    note = {R package version 1.3.4.9000},
    url = {https://github.com/trafficonese/leaflet.extras2},
  }
