To cite package ‘layer’ in publications use:

Sciaini M, Scherer C (2026). layer: Tilt your Maps and Turn Them into 'ggplot' Plots. R package version 0.0.4.9000, https://github.com/marcosci/layer.

Corresponding BibTeX entry:

  @Manual{,
    title = {layer: Tilt your Maps and Turn Them into 'ggplot' Plots},
    author = {Marco Sciaini and Cédric Scherer},
    year = {2026},
    note = {R package version 0.0.4.9000},
    url = {https://github.com/marcosci/layer},
  }