To cite package ‘fletcher’ in publications use:

  Longros C (2026). _fletcher: Compute Fletcher Checksums (16, 32, and
  64 Bit)_. R package version 0.1.0,
  <https://github.com/chrislongros/fletcher>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {fletcher: Compute Fletcher Checksums (16, 32, and 64 Bit)},
    author = {Christos Longros},
    year = {2026},
    note = {R package version 0.1.0},
    url = {https://github.com/chrislongros/fletcher},
  }