To cite package ‘geesibsor’ in publications use:

  Broman K (2026). _geesibsor: Odds Ratio for Siblings by GEE_. R
  package version 0.51-6, <https://github.com/kbroman/geesibsor>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {geesibsor: Odds Ratio for Siblings by GEE},
    author = {Karl W Broman},
    year = {2026},
    note = {R package version 0.51-6},
    url = {https://github.com/kbroman/geesibsor},
  }