To cite package ‘zufft’ in publications use:

  Baltazar P (2026). _zufft: Fast Fourier, Cosine and Sine Transforms_.
  R package version 0.1.0, <https://CRAN.R-project.org/package=zufft>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {zufft: Fast Fourier, Cosine and Sine Transforms},
    author = {Pedro Baltazar},
    year = {2026},
    note = {R package version 0.1.0},
    url = {https://CRAN.R-project.org/package=zufft},
  }