To cite package ‘BTTL’ in publications use:

  Hermes S (2024). _BTTL: Bradley-Terry Transfer Learning_. R package
  version 1.0.0, <https://CRAN.R-project.org/package=BTTL>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {BTTL: Bradley-Terry Transfer Learning},
    author = {Sjoerd Hermes},
    year = {2024},
    note = {R package version 1.0.0},
    url = {https://CRAN.R-project.org/package=BTTL},
  }