To cite package ‘actfts’ in publications use:

  Rodríguez D, Sierra S (2025). _actfts: Autocorrelation Tools Featured
  for Time Series_. R package version 0.3.0,
  <https://CRAN.R-project.org/package=actfts>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {actfts: Autocorrelation Tools Featured for Time Series},
    author = {David Rodríguez and Sergio Sierra},
    year = {2025},
    note = {R package version 0.3.0},
    url = {https://CRAN.R-project.org/package=actfts},
  }