To cite package ‘tidydfidx’ in publications use:

  Croissant Y (2026). _tidydfidx: Indexed 'tibble' and Methods for
  'dplyr'_. R package version 0.0-3,
  <https://github.com/ycroissant/tidydfidx>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {tidydfidx: Indexed 'tibble' and Methods for 'dplyr'},
    author = {Yves Croissant},
    year = {2026},
    note = {R package version 0.0-3},
    url = {https://github.com/ycroissant/tidydfidx},
  }