To cite tsbox in publications use:

  Sax C (2021). _tsbox: Class-Agnostic Time Series in in R_. R package,
  <https://docs.ropensci.org/tsbox/>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {tsbox: Class-Agnostic Time Series in in {R}},
    author = {Christoph Sax},
    note = {{R package}},
    url = {https://docs.ropensci.org/tsbox/},
    year = {2021},
  }