To cite package ‘fereg’ in publications use:

  Liu L (2026). _fereg: Fast Fixed-Effects Estimation with the 'fixest'
  Interface_. R package version 0.4.0,
  <https://CRAN.R-project.org/package=fereg>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {fereg: Fast Fixed-Effects Estimation with the 'fixest' Interface},
    author = {Leo Liu},
    year = {2026},
    note = {R package version 0.4.0},
    url = {https://CRAN.R-project.org/package=fereg},
  }