To cite package ‘otter’ in publications use:

  Vahtrik O (2026). _otter: Ott's Utility Functions_. R package version
  0.1.0, <https://github.com/ottvahtrik/otter>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {otter: Ott's Utility Functions},
    author = {Ott Vahtrik},
    year = {2026},
    note = {R package version 0.1.0},
    url = {https://github.com/ottvahtrik/otter},
  }