To cite package ‘ftsspec’ in publications use:

Tavakoli S (2026). ftsspec: Spectral Density Estimation and Comparison for Functional Time Series. R package version 1.0.1, https://github.com/stavakol/ftsspec.

Corresponding BibTeX entry:

  @Manual{,
    title = {ftsspec: Spectral Density Estimation and Comparison for
      Functional Time Series},
    author = {Shahin Tavakoli},
    year = {2026},
    note = {R package version 1.0.1},
    url = {https://github.com/stavakol/ftsspec},
  }