To cite package ‘s2’ in publications use:

Dunnington D, Pebesma E, Rubak E (2026). s2: Spherical Geometry Operators Using the S2 Geometry Library. R package version 1.1.13, https://CRAN.R-project.org/package=s2.

Corresponding BibTeX entry:

  @Manual{,
    title = {s2: Spherical Geometry Operators Using the S2 Geometry
      Library},
    author = {Dewey Dunnington and Edzer Pebesma and Ege Rubak},
    year = {2026},
    note = {R package version 1.1.13},
    url = {https://CRAN.R-project.org/package=s2},
  }