To cite package ‘hdftsa’ in publications use:

  Shang HL (2025). _hdftsa: High-Dimensional Functional Time Series
  Analysis_. R package version 1.0,
  <https://CRAN.R-project.org/package=hdftsa>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {hdftsa: High-Dimensional Functional Time Series Analysis},
    author = {Han Lin Shang},
    year = {2025},
    note = {R package version 1.0},
    url = {https://CRAN.R-project.org/package=hdftsa},
  }