To cite planscorer in publications use:

  Kenny C, Migurski M, McCartan C (2024). _planscorer: Score
  Redistricting Plans with PlanScore_. R package,
  <https://christophertkenny.com/planscorer/>.

A BibTeX entry for LaTeX users is

  @Manual{planscorer,
    title = {{planscorer}: Score Redistricting Plans with PlanScore},
    author = {Christopher T. Kenny and Michal Migurski and Cory McCartan},
    year = {2024},
    note = {R package},
    url = {https://christophertkenny.com/planscorer/},
  }