To cite package ‘ttTensor’ in publications use:

  Tsuyuzaki K, Ishii M, Nikaido I (2025). _ttTensor: Tensor-Train
  Decomposition_. R package version 1.0.2,
  <https://github.com/rikenbit/tttensor>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {ttTensor: Tensor-Train Decomposition},
    author = {Koki Tsuyuzaki and Manabu Ishii and Itoshi Nikaido},
    year = {2025},
    note = {R package version 1.0.2},
    url = {https://github.com/rikenbit/tttensor},
  }