To cite package ‘tanaka’ in publications use:

Giraud T (2023). tanaka: Design Shaded Contour Lines (or Tanaka) Maps. R package version 0.4.0, https://github.com/riatelab/tanaka.

Corresponding BibTeX entry:

  @Manual{,
    title = {tanaka: Design Shaded Contour Lines (or Tanaka) Maps},
    author = {Timothée Giraud},
    year = {2023},
    note = {R package version 0.4.0},
    url = {https://github.com/riatelab/tanaka},
  }