To cite package ‘fUnitRoots’ in publications use:

  Wuertz D, Setz T, Chalabi Y (2025). _fUnitRoots: Rmetrics - Modelling
  Trends and Unit Roots_. R package version 4052.82,
  <https://CRAN.R-project.org/package=fUnitRoots>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {fUnitRoots: Rmetrics - Modelling Trends and Unit Roots},
    author = {Diethelm Wuertz and Tobias Setz and Yohan Chalabi},
    year = {2025},
    note = {R package version 4052.82},
    url = {https://CRAN.R-project.org/package=fUnitRoots},
  }