To cite package ‘triplesmatch’ in publications use:

  Brumberg K (2024). _triplesmatch: Match Triples Consisting of Two
  Controls and a Treated Unit or Vice Versa_. R package version 1.1.0,
  <https://CRAN.R-project.org/package=triplesmatch>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {triplesmatch: Match Triples Consisting of Two Controls and a Treated Unit or
Vice Versa},
    author = {Katherine Brumberg},
    year = {2024},
    note = {R package version 1.1.0},
    url = {https://CRAN.R-project.org/package=triplesmatch},
  }