To cite package ‘btb’ in publications use:

Dos Santos A, Sémécurbe F, Pramil J (2026). btb: Beyond the Border - Kernel Density Estimation for Urban Geography. R package version 0.2.2, https://github.com/inseefr/btb.

Corresponding BibTeX entry:

  @Manual{,
    title = {btb: Beyond the Border - Kernel Density Estimation for
      Urban Geography},
    author = {Arlindo {Dos Santos} and François Sémécurbe and Julien
      Pramil},
    year = {2026},
    note = {R package version 0.2.2},
    url = {https://github.com/inseefr/btb},
  }