To cite package ‘leafem’ in publications use:

  Appelhans T (2024). _leafem: 'leaflet' Extensions for 'mapview'_. R
  package version 0.2.3.9006, , <https://github.com/r-spatial/leafem>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {leafem: 'leaflet' Extensions for 'mapview'},
    author = {Tim Appelhans},
    year = {2024},
    note = {R package version 0.2.3.9006, 
},
    url = {https://github.com/r-spatial/leafem},
  }