To cite package ‘accessibility’ in publications use:

  Pereira R, Herszenhut D, Soukhov A (2026). _accessibility: Transport
  Accessibility Measures_. R package version 1.6.0,
  <https://CRAN.R-project.org/package=accessibility>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {accessibility: Transport Accessibility Measures},
    author = {Rafael H. M. Pereira and Daniel Herszenhut and Anastasia Soukhov},
    year = {2026},
    note = {R package version 1.6.0},
    url = {https://CRAN.R-project.org/package=accessibility},
  }