To cite couplr in publications use:

Colling G (2026). couplr: Optimal Pairing and Matching via Linear Assignment. doi:10.32614/CRAN.package.couplr. R package version 1.8.1, https://CRAN.R-project.org/package=couplr.

Corresponding BibTeX entry:

  @Manual{,
    title = {couplr: Optimal Pairing and Matching via Linear
      Assignment},
    author = {Gilles Colling},
    year = {2026},
    note = {R package version 1.8.1},
    url = {https://CRAN.R-project.org/package=couplr},
    doi = {10.32614/CRAN.package.couplr},
  }