To cite package ‘casimir’ in publications use:

  Kähler M, Schumacher M (2025). _casimir: Comparing Automated Subject
  Indexing Methods in R_. R package version 0.3.3,
  <https://github.com/deutsche-nationalbibliothek/casimir>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {casimir: Comparing Automated Subject Indexing Methods in R},
    author = {Maximilian Kähler and Markus Schumacher},
    year = {2025},
    note = {R package version 0.3.3},
    url = {https://github.com/deutsche-nationalbibliothek/casimir},
  }