To cite package ‘bkcheck’ in publications use:

  Klamer B (2026). _bkcheck: Fast and Simple Argument Checks_. R
  package version 2026.1.14.999,
  <https://bitbucket.org/bklamer/bkcheck>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {bkcheck: Fast and Simple Argument Checks},
    author = {Brett Klamer},
    year = {2026},
    note = {R package version 2026.1.14.999},
    url = {https://bitbucket.org/bklamer/bkcheck},
  }